dcbnl: Add support for setapp/getapp to netdev dcbnl_rtnl_ops

Adds support of dcbnl setapp/getapp to dcbnl_rtnl_ops in netdev to allow
LLDs to implement their corresponding dcbnl setapp/getapp ops to support
the IEEE 802.1Q DCBX setapp/getapp commands.

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>

include/net/dcbnl.h

@@ -48,6 +48,8 @@ struct dcbnl_rtnl_ops {
 	void (*setbcncfg)(struct net_device *, int, u32);
 	void (*getbcnrp)(struct net_device *, int, u8 *);
 	void (*setbcnrp)(struct net_device *, int, u8);
+	u8   (*setapp)(struct net_device *, u8, u16, u8);
+	u8   (*getapp)(struct net_device *, u8, u16);
 };
 
 #endif /* __NET_DCBNL_H__ */