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_stp_if.c b/net/bridge/br_stp_if.c
index 6f615b8..10eda3c 100644
--- a/net/bridge/br_stp_if.c
+++ b/net/bridge/br_stp_if.c
@@ -88,6 +88,7 @@
 	br_init_port(p);
 	br_port_state_selection(p->br);
 	br_log_state(p);
+	br_ifinfo_notify(RTM_NEWLINK, p);
 }
 
 /* called under bridge lock */
@@ -104,6 +105,8 @@
 	p->topology_change_ack = 0;
 	p->config_pending = 0;
 
+	br_ifinfo_notify(RTM_NEWLINK, p);
+
 	del_timer(&p->message_age_timer);
 	del_timer(&p->forward_delay_timer);
 	del_timer(&p->hold_timer);