mac80211: pass vif param to conf_tx() callback

tx params should be configured per interface.
add ieee80211_vif param to the conf_tx callback,
and change all the drivers that use this callback.

The following spatch was used:
@rule1@
struct ieee80211_ops ops;
identifier conf_tx_op;
@@
	ops.conf_tx = conf_tx_op;

@rule2@
identifier rule1.conf_tx_op;
identifier hw, queue, params;
@@
	conf_tx_op (
-		struct ieee80211_hw *hw,
+		struct ieee80211_hw *hw, struct ieee80211_vif *vif,
		u16 queue,
		const struct ieee80211_tx_queue_params *params) {...}

Signed-off-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/rt2x00/rt2400pci.c b/drivers/net/wireless/rt2x00/rt2400pci.c
index 7e9272b..3a6b402 100644
--- a/drivers/net/wireless/rt2x00/rt2400pci.c
+++ b/drivers/net/wireless/rt2x00/rt2400pci.c
@@ -1648,7 +1648,8 @@
 /*
  * IEEE80211 stack callback functions.
  */
-static int rt2400pci_conf_tx(struct ieee80211_hw *hw, u16 queue,
+static int rt2400pci_conf_tx(struct ieee80211_hw *hw,
+			     struct ieee80211_vif *vif, u16 queue,
 			     const struct ieee80211_tx_queue_params *params)
 {
 	struct rt2x00_dev *rt2x00dev = hw->priv;
@@ -1661,7 +1662,7 @@
 	if (queue != 0)
 		return -EINVAL;
 
-	if (rt2x00mac_conf_tx(hw, queue, params))
+	if (rt2x00mac_conf_tx(hw, vif, queue, params))
 		return -EINVAL;
 
 	/*