batman-adv: Simplify 'batadv_v_ogm_aggr_list_free()'

Use 'skb_queue_purge()' instead of re-implementing it.
Signed-off-by: NChristophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: NSven Eckelmann <sven@narfation.org>
Signed-off-by: NSimon Wunderlich <sw@simonwunderlich.de>

net/batman-adv/bat_v_ogm.c

@@ -178,13 +178,9 @@ static bool batadv_v_ogm_queue_left(struct sk_buff *skb,
  */
 static void batadv_v_ogm_aggr_list_free(struct batadv_hard_iface *hard_iface)
 {
-	struct sk_buff *skb;
-
 	lockdep_assert_held(&hard_iface->bat_v.aggr_list_lock);
 
-	while ((skb = skb_dequeue(&hard_iface->bat_v.aggr_list)))
-		kfree_skb(skb);
-
+	skb_queue_purge(&hard_iface->bat_v.aggr_list);
 	hard_iface->bat_v.aggr_len = 0;
 }