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/rt2800lib.c b/drivers/net/wireless/rt2x00/rt2800lib.c
index 9688dd0..3f183a1 100644
--- a/drivers/net/wireless/rt2x00/rt2800lib.c
+++ b/drivers/net/wireless/rt2x00/rt2800lib.c
@@ -4398,7 +4398,8 @@
 }
 EXPORT_SYMBOL_GPL(rt2800_set_rts_threshold);
 
-int rt2800_conf_tx(struct ieee80211_hw *hw, u16 queue_idx,
+int rt2800_conf_tx(struct ieee80211_hw *hw,
+		   struct ieee80211_vif *vif, u16 queue_idx,
 		   const struct ieee80211_tx_queue_params *params)
 {
 	struct rt2x00_dev *rt2x00dev = hw->priv;
@@ -4414,7 +4415,7 @@
 	 * we are free to update the registers based on the value
 	 * in the queue parameter.
 	 */
-	retval = rt2x00mac_conf_tx(hw, queue_idx, params);
+	retval = rt2x00mac_conf_tx(hw, vif, queue_idx, params);
 	if (retval)
 		return retval;