IPoIB: Fix unused variable warning

The conversion to use netdevice internal stats left an unused variable
in ipoib_neigh_free(), since there's no longer any reason to get
netdev_priv() in order to increment dropped packets.  Delete the
unused priv variable.
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

drivers/infiniband/ulp/ipoib/ipoib_main.c

@@ -854,7 +854,6 @@ struct ipoib_neigh *ipoib_neigh_alloc(struct neighbour *neighbour)
 
 void ipoib_neigh_free(struct net_device *dev, struct ipoib_neigh *neigh)
 {
-	struct ipoib_dev_priv *priv = netdev_priv(dev);
 	struct sk_buff *skb;
 	*to_ipoib_neigh(neigh->neighbour) = NULL;
 	while ((skb = __skb_dequeue(&neigh->queue))) {