cxgb4/l2t: Simplify 't4_l2e_free()' and '_t4_l2e_free()'

Use '__skb_queue_purge()' instead of re-implementing it.
Signed-off-by: NChristophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/chelsio/cxgb4/l2t.c

@@ -351,15 +351,13 @@ static struct l2t_entry *find_or_alloc_l2e(struct l2t_data *d, u16 vlan,
 static void _t4_l2e_free(struct l2t_entry *e)
 {
 	struct l2t_data *d;
-	struct sk_buff *skb;
 
 	if (atomic_read(&e->refcnt) == 0) {  /* hasn't been recycled */
 		if (e->neigh) {
 			neigh_release(e->neigh);
 			e->neigh = NULL;
 		}
-		while ((skb = __skb_dequeue(&e->arpq)) != NULL)
-			kfree_skb(skb);
+		__skb_queue_purge(&e->arpq);
 	}
 
 	d = container_of(e, struct l2t_data, l2tab[e->idx]);
@@ -370,7 +368,6 @@ static void _t4_l2e_free(struct l2t_entry *e)
 static void t4_l2e_free(struct l2t_entry *e)
 {
 	struct l2t_data *d;
-	struct sk_buff *skb;
 
 	spin_lock_bh(&e->lock);
 	if (atomic_read(&e->refcnt) == 0) {  /* hasn't been recycled */
@@ -378,8 +375,7 @@ static void t4_l2e_free(struct l2t_entry *e)
 			neigh_release(e->neigh);
 			e->neigh = NULL;
 		}
-		while ((skb = __skb_dequeue(&e->arpq)) != NULL)
-			kfree_skb(skb);
+		__skb_queue_purge(&e->arpq);
 	}
 	spin_unlock_bh(&e->lock);