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/mwl8k.c b/drivers/net/wireless/mwl8k.c
index ea1395a..995695c 100644
--- a/drivers/net/wireless/mwl8k.c
+++ b/drivers/net/wireless/mwl8k.c
@@ -4915,7 +4915,8 @@
 	return ret;
 }
 
-static int mwl8k_conf_tx(struct ieee80211_hw *hw, u16 queue,
+static int mwl8k_conf_tx(struct ieee80211_hw *hw,
+			 struct ieee80211_vif *vif, u16 queue,
 			 const struct ieee80211_tx_queue_params *params)
 {
 	struct mwl8k_priv *priv = hw->priv;
@@ -5462,7 +5463,7 @@
 		goto fail;
 
 	for (i = 0; i < MWL8K_TX_WMM_QUEUES; i++) {
-		rc = mwl8k_conf_tx(hw, i, &priv->wmm_params[i]);
+		rc = mwl8k_conf_tx(hw, NULL, i, &priv->wmm_params[i]);
 		if (rc)
 			goto fail;
 	}