ixgbe: Add support for dcbnl_rtnl_ops.setapp/getapp

Add support for dcbnl_rtnl_ops.setapp/getapp to set or get the current user
priority bitmap for the given application protocol. Currently, 82599 only
supports setapp/getapp for Fiber Channel over Ethernet (FCoE) protocol.

Signed-off-by: Yi Zou <yi.zou@intel.com>
Acked-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c
index 30a58fb..f907836 100644
--- a/drivers/net/ixgbe/ixgbe_main.c
+++ b/drivers/net/ixgbe/ixgbe_main.c
@@ -3801,6 +3801,8 @@
 		adapter->flags |= IXGBE_FLAG_FCOE_CAPABLE;
 		adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
 		adapter->ring_feature[RING_F_FCOE].indices = 0;
+		/* Default traffic class to use for FCoE */
+		adapter->fcoe.tc = IXGBE_FCOE_DEFTC;
 #endif /* IXGBE_FCOE */
 	}