net: bridge: vlan: add del rtm message support

Adding RTM_DELVLAN support similar to RTM_NEWVLAN is simple, just need to
map DELVLAN to DELLINK and register the handler.
Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/bridge/br_vlan.c

@@ -1697,6 +1697,9 @@ static int br_vlan_rtm_process_one(struct net_device *dev,
 	case RTM_NEWVLAN:
 		cmdmap = RTM_SETLINK;
 		break;
+	case RTM_DELVLAN:
+		cmdmap = RTM_DELLINK;
+		break;
 	}
 
 	err = br_process_vlan_info(br, p, cmdmap, vinfo, &vinfo_last, &changed,
@@ -1757,10 +1760,13 @@ void br_vlan_rtnl_init(void)
 			     br_vlan_rtm_dump, 0);
 	rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_NEWVLAN,
 			     br_vlan_rtm_process, NULL, 0);
+	rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_DELVLAN,
+			     br_vlan_rtm_process, NULL, 0);
 }
 
 void br_vlan_rtnl_uninit(void)
 {
 	rtnl_unregister(PF_BRIDGE, RTM_GETVLAN);
 	rtnl_unregister(PF_BRIDGE, RTM_NEWVLAN);
+	rtnl_unregister(PF_BRIDGE, RTM_DELVLAN);
 }