[IPoIB] no need to set skb->dev right before freeing skb

For cut-and-paste reasons, the IPoIB driver was setting skb->dev right
before calling dev_kfree_skb_any().  Get rid of this.

Signed-off-by: Roland Dreier <rolandd@cisco.com>

drivers/infiniband/ulp/ipoib/ipoib_multicast.c

@@ -120,12 +120,8 @@ static void ipoib_mcast_free(struct ipoib_mcast *mcast)
 	if (mcast->ah)
 		ipoib_put_ah(mcast->ah);
 
-	while (!skb_queue_empty(&mcast->pkt_queue)) {
-		struct sk_buff *skb = skb_dequeue(&mcast->pkt_queue);
-
-		skb->dev = dev;
-		dev_kfree_skb_any(skb);
-	}
+	while (!skb_queue_empty(&mcast->pkt_queue))
+		dev_kfree_skb_any(skb_dequeue(&mcast->pkt_queue));
 
 	kfree(mcast);
 }
@@ -317,13 +313,8 @@ ipoib_mcast_sendonly_join_complete(int status,
 					IPOIB_GID_ARG(mcast->mcmember.mgid), status);
 
 		/* Flush out any queued packets */
-		while (!skb_queue_empty(&mcast->pkt_queue)) {
-			struct sk_buff *skb = skb_dequeue(&mcast->pkt_queue);
-
-			skb->dev = dev;
-
-			dev_kfree_skb_any(skb);
-		}
+		while (!skb_queue_empty(&mcast->pkt_queue))
+			dev_kfree_skb_any(skb_dequeue(&mcast->pkt_queue));
 
 		/* Clear the busy flag so we try again */
 		clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags);