bridge: add notification over netlink when STP changes state

When STP changes state of interface need to send a new link
message to reflect that change.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c
index 6814083..5b1ed1b 100644
--- a/net/bridge/br_netlink.c
+++ b/net/bridge/br_netlink.c
@@ -188,6 +188,8 @@
 
 	p->state = new_state;
 	br_log_state(p);
+	br_ifinfo_notify(RTM_NEWLINK, p);
+
 	return 0;
 }