usb: Tidy up the usb_start flag

This should be declared in a header file so that type-checking works
correctly.

Add a single declaration to usb.h and remove the others.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Marek Vasut <marex@denx.de>
Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>

1 files changed, 0 insertions, 1 deletions

diff --git a/cmd/usb.c b/cmd/usb.c
index 73addb04c4..6193728384 100644
--- a/cmd/usb.c
+++ b/cmd/usb.c
@@ -620,7 +620,6 @@ static int do_usb(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 {
 	struct usb_device *udev = NULL;
 	int i;
-	extern char usb_started;
 
 	if (argc < 2)
 		return CMD_RET_USAGE;