amd-xgbe: Add traffic class support

This patch adds support for traffic classes as well as support
for Data Center Bridging interfaces related to traffic classes
and priority flow control.

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/amd/Kconfig b/drivers/net/ethernet/amd/Kconfig
index 98ef8ff..8319c99 100644
--- a/drivers/net/ethernet/amd/Kconfig
+++ b/drivers/net/ethernet/amd/Kconfig
@@ -192,4 +192,14 @@
 	  To compile this driver as a module, choose M here: the module
 	  will be called amd-xgbe.
 
+config AMD_XGBE_DCB
+	bool "Data Center Bridging (DCB) support"
+	default n
+	depends on AMD_XGBE && DCB
+	---help---
+	  Say Y here to enable Data Center Bridging (DCB) support in the
+	  driver.
+
+	  If unsure, say N.
+
 endif # NET_VENDOR_AMD