netdev: Move queue_lock into struct netdev_queue.

The lock is now an attribute of the device queue.

One thing to notice is that "suspicious" places
emerge which will need specific training about
multiple queue handling.  They are so marked with
explicit "netdev->rx_queue" and "netdev->tx_queue"
references.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/mac80211/wme.c b/net/mac80211/wme.c
index 2fbc171..59ed9ca 100644
--- a/net/mac80211/wme.c
+++ b/net/mac80211/wme.c
@@ -648,7 +648,7 @@
 }
 
 /**
- * the caller needs to hold local->mdev->queue_lock
+ * the caller needs to hold local->mdev->tx_queue.lock
  */
 void ieee80211_ht_agg_queue_remove(struct ieee80211_local *local,
 				   struct sta_info *sta, u16 tid,