mac80211: add ieee80211_vif param to tsf functions

TSF can be kept per vif.
Add ieee80211_vif param to set/get/reset_tsf, and move
the debugfs entries to the per-vif directory.

Update all the drivers that implement these callbacks.

Signed-off-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/wl12xx/main.c b/drivers/net/wireless/wl12xx/main.c
index a51dd0e..7d409b0 100644
--- a/drivers/net/wireless/wl12xx/main.c
+++ b/drivers/net/wireless/wl12xx/main.c
@@ -3815,7 +3815,8 @@
 	return ret;
 }
 
-static u64 wl1271_op_get_tsf(struct ieee80211_hw *hw)
+static u64 wl1271_op_get_tsf(struct ieee80211_hw *hw,
+			     struct ieee80211_vif *vif)
 {
 
 	struct wl1271 *wl = hw->priv;