lspci: Decode Multicast Extended Capability

Decode the Multicast Extended Capability described in PCIe r4.0, sec
7.9.11.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

1 files changed, 257 insertions, 0 deletions

diff --git a/tests/cap-multicast b/tests/cap-multicast
new file mode 100644
index 0000000..3fd2c31
--- /dev/null
+++ b/tests/cap-multicast
@@ -0,0 +1,257 @@
+07:00.0 PCI bridge: PLX Technology, Inc. Device 8796 (rev ab)
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