macvlan: use rx_handler_data pointer to store macvlan_port pointer V2

Register macvlan_port pointer as rx_handler data pointer. As macvlan_port is
removed from struct net_device, another netdev priv_flag is added to indicate
the device serves as a macvlan port.

Signed-off-by: Jiri Pirko <jpirko@redhat.com>
Acked-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/if.h b/include/linux/if.h
index be350e6..31f2e27 100644
--- a/include/linux/if.h
+++ b/include/linux/if.h
@@ -73,6 +73,7 @@
 #define IFF_DONT_BRIDGE 0x800		/* disallow bridging this ether dev */
 #define IFF_IN_NETPOLL	0x1000		/* whether we are processing netpoll */
 #define IFF_DISABLE_NETPOLL	0x2000	/* disable netpoll at run-time */
+#define IFF_MACVLAN_PORT	0x4000	/* device used as macvlan port */
 
 #define IF_GET_IFACE	0x0001		/* for querying only */
 #define IF_GET_PROTO	0x0002