[ATM]: [br2684] if we free the skb, we should return 0

From: "Jean-Denis Boyer" <[e-mail]>
Signed-off-by: Chas Williams <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

net/atm/br2684.c

···
 		/* netif_stop_queue(dev); */
 		dev_kfree_skb(skb);
 		read_unlock(&devs_lock);
-		return -EUNATCH;
+		return 0;
 	}
 	if (!br2684_xmit_vcc(skb, brdev, brvcc)) {
 		/*