vxlan: dont migrate permanent fdb entries during learn

This patch fixes vxlan_snoop to not move permanent fdb entries
on learn events. This is consistent with the bridge fdb
handling of permanent entries.

Fixes: 26a41ae6 ("vxlan: only migrate dynamic FDB entries")
Signed-off-by: NRoopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/vxlan.c

@@ -970,7 +970,7 @@ static bool vxlan_snoop(struct net_device *dev,
 			return false;
 
 		/* Don't migrate static entries, drop packets */
-		if (f->state & NUD_NOARP)
+		if (f->state & (NUD_PERMANENT | NUD_NOARP))
 			return true;
 
 		if (net_ratelimit())