SPDX: Convert all of our single license tags to Linux Kernel style

When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>

20 files changed, 20 insertions, 41 deletions

diff --git a/env/Makefile b/env/Makefile
index 7ce8231d9a..fa635c8082 100644
--- a/env/Makefile
+++ b/env/Makefile
@@ -1,9 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0+
 #
 # (C) Copyright 2004-2006
 # Wolfgang Denk, DENX Software Engineering, wd@denx.de.
-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
 
 obj-y += common.o env.o
 
diff --git a/env/attr.c b/env/attr.c
index f965b4bbb6..a958c71482 100644
--- a/env/attr.c
+++ b/env/attr.c
@@ -1,8 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * (C) Copyright 2012
  * Joe Hershberger, National Instruments, joe.hershberger@ni.com
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #ifdef USE_HOSTCC /* Eliminate "ANSI does not permit..." warnings */
diff --git a/env/callback.c b/env/callback.c
index be70980f04..54d2de4a96 100644
--- a/env/callback.c
+++ b/env/callback.c
@@ -1,8 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * (C) Copyright 2012
  * Joe Hershberger, National Instruments, joe.hershberger@ni.com
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>
diff --git a/env/common.c b/env/common.c
index 8f602de9d2..dc8a14f519 100644
--- a/env/common.c
+++ b/env/common.c
@@ -1,11 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * (C) Copyright 2000-2010
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  *
  * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
  * Andreas Heppel <aheppel@sysgo.de>
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>
diff --git a/env/eeprom.c b/env/eeprom.c
index 63842d6ff3..ac2689cc14 100644
--- a/env/eeprom.c
+++ b/env/eeprom.c
@@ -1,11 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * (C) Copyright 2000-2010
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  *
  * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
  * Andreas Heppel <aheppel@sysgo.de>
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>
diff --git a/env/embedded.c b/env/embedded.c
index 9b0a6a3c3d..b1090e90e5 100644
--- a/env/embedded.c
+++ b/env/embedded.c
@@ -1,8 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * (C) Copyright 2001
  * Erik Theisen,  Wave 7 Optics, etheisen@mindspring.com.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <linux/kconfig.h>
diff --git a/env/env.c b/env/env.c
index 90d65974d0..5c0842ac07 100644
--- a/env/env.c
+++ b/env/env.c
@@ -1,8 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (C) 2017 Google, Inc
  * Written by Simon Glass <sjg@chromium.org>
- *
- * SPDX-License-Identifier:     GPL-2.0+
  */
 
 #include <common.h>
diff --git a/env/ext4.c b/env/ext4.c
index f4cb28570c..7626784ca6 100644
--- a/env/ext4.c
+++ b/env/ext4.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * (c) Copyright 2016 by VRT Technology
  *
@@ -15,8 +16,6 @@
  * EXT4 filesystem implementation in Uboot by
  * Uma Shankar <uma.shankar@samsung.com>
  * Manjunatha C Achar <a.manjunatha@samsung.com>
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>
diff --git a/env/fat.c b/env/fat.c
index befbc1efdd..5e5b1efe89 100644
--- a/env/fat.c
+++ b/env/fat.c
@@ -1,10 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * (c) Copyright 2011 by Tigris Elektronik GmbH
  *
  * Author:
  *  Maximilian Schwerin <mvs@tigris.de>
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>
diff --git a/env/flags.c b/env/flags.c
index 4b0ddb6bb8..79dccc05fe 100644
--- a/env/flags.c
+++ b/env/flags.c
@@ -1,8 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * (C) Copyright 2012
  * Joe Hershberger, National Instruments, joe.hershberger@ni.com
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <linux/string.h>
diff --git a/env/flash.c b/env/flash.c
index ccade77ce3..32236c716e 100644
--- a/env/flash.c
+++ b/env/flash.c
@@ -1,11 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * (C) Copyright 2000-2010
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  *
  * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
  * Andreas Heppel <aheppel@sysgo.de>
-
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 /* #define DEBUG */
diff --git a/env/mmc.c b/env/mmc.c
index bf7015cd14..5e3da6dca7 100644
--- a/env/mmc.c
+++ b/env/mmc.c
@@ -1,7 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * (C) Copyright 2008-2011 Freescale Semiconductor, Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 /* #define DEBUG */
diff --git a/env/nand.c b/env/nand.c
index 904f1c40d6..aecf445c21 100644
--- a/env/nand.c
+++ b/env/nand.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * (C) Copyright 2000-2010
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
@@ -10,8 +11,6 @@
  *
  * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
  * Andreas Heppel <aheppel@sysgo.de>
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>
diff --git a/env/nowhere.c b/env/nowhere.c
index f654883c8a..ea6c32eb3b 100644
--- a/env/nowhere.c
+++ b/env/nowhere.c
@@ -1,11 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * (C) Copyright 2000-2010
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  *
  * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
  * Andreas Heppel <aheppel@sysgo.de>
-
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>
diff --git a/env/nvram.c b/env/nvram.c
index 7cc62b631e..df1b37913d 100644
--- a/env/nvram.c
+++ b/env/nvram.c
@@ -1,11 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * (C) Copyright 2000-2010
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  *
  * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
  * Andreas Heppel <aheppel@sysgo.de>
-
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 /*
diff --git a/env/onenand.c b/env/onenand.c
index 10a8cccbe8..d371bd757c 100644
--- a/env/onenand.c
+++ b/env/onenand.c
@@ -1,11 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * (C) Copyright 2010 DENX Software Engineering
  * Wolfgang Denk <wd@denx.de>
  *
  * (C) Copyright 2005-2009 Samsung Electronics
  * Kyungmin Park <kyungmin.park@samsung.com>
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>
diff --git a/env/remote.c b/env/remote.c
index 379d0eb1bb..b1a7d1a4c1 100644
--- a/env/remote.c
+++ b/env/remote.c
@@ -1,7 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * (C) Copyright 2011-2012 Freescale Semiconductor, Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 /* #define DEBUG */
diff --git a/env/sata.c b/env/sata.c
index c3e530eb31..e5715e6d51 100644
--- a/env/sata.c
+++ b/env/sata.c
@@ -1,7 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * (C) Copyright 2010-2016 Freescale Semiconductor, Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 /* #define DEBUG */
diff --git a/env/sf.c b/env/sf.c
index 6326b37e46..7f7f731992 100644
--- a/env/sf.c
+++ b/env/sf.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * (C) Copyright 2000-2010
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
@@ -6,8 +7,6 @@
  * Andreas Heppel <aheppel@sysgo.de>
  *
  * (C) Copyright 2008 Atmel Corporation
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 #include <common.h>
 #include <dm.h>
diff --git a/env/ubi.c b/env/ubi.c
index d4f4901ac4..d28247b34d 100644
--- a/env/ubi.c
+++ b/env/ubi.c
@@ -1,8 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * (c) Copyright 2012 by National Instruments,
  *        Joe Hershberger <joe.hershberger@ni.com>
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>