bridge: Add vlan id to multicast groups

Add vlan_id to multicasts groups so that we know which vlan
each group belongs to and can correctly forward to appropriate vlan.

Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index f4ae87b..22915c8 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -63,6 +63,7 @@
 #endif
 	} u;
 	__be16		proto;
+	__u16		vid;
 };
 
 struct net_port_vlans {