[BRIDGE]: receive link-local on disabled ports.

This change allows link local packets (like 802.3ad and Spanning Tree
Protocol) to be processed even when the bridge is not using the port.
It fixes the chicken-egg problem for bridging a bonded device, and
may also fix problems with spanning tree failover.
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/bridge/br_input.c

@@ -125,9 +125,6 @@ int br_handle_frame(struct net_bridge_port *p, struct sk_buff **pskb)
 	struct sk_buff *skb = *pskb;
 	const unsigned char *dest = eth_hdr(skb)->h_dest;
 
-	if (p->state == BR_STATE_DISABLED)
-		goto err;
-
 	if (!is_valid_ether_addr(eth_hdr(skb)->h_source))
 		goto err;