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/rtl818x/rtl8187/dev.c b/drivers/net/wireless/rtl818x/rtl8187/dev.c
index f5afa15..24873b5 100644
--- a/drivers/net/wireless/rtl818x/rtl8187/dev.c
+++ b/drivers/net/wireless/rtl818x/rtl8187/dev.c
@@ -1241,7 +1241,8 @@
 	rtl818x_iowrite32_async(priv, &priv->map->RX_CONF, priv->rx_conf);
 }
 
-static int rtl8187_conf_tx(struct ieee80211_hw *dev, u16 queue,
+static int rtl8187_conf_tx(struct ieee80211_hw *dev,
+			   struct ieee80211_vif *vif, u16 queue,
 			   const struct ieee80211_tx_queue_params *params)
 {
 	struct rtl8187_priv *priv = dev->priv;