vxlan: send notification when MAC migrates

When learned entry migrates to another IP send a notification
that entry has changed.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index b061c98..1f2aa26 100644
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -629,6 +629,7 @@
 
 		f->remote.remote_ip = src_ip;
 		f->updated = jiffies;
+		vxlan_fdb_notify(vxlan, f, RTM_NEWNEIGH);
 	} else {
 		/* learned new entry */
 		spin_lock(&vxlan->hash_lock);