mac80211: use subqueue helpers

There are subqueue helpers so that we don't
need to get the TX queue and then wake/stop
it, use those helpers.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 92764bb..ccf3737 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -2092,8 +2092,7 @@
 
 		if (skb_queue_empty(&local->pending[i]))
 			list_for_each_entry_rcu(sdata, &local->interfaces, list)
-				netif_tx_wake_queue(
-					netdev_get_tx_queue(sdata->dev, i));
+				netif_wake_subqueue(sdata->dev, i);
 	}
 	spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);