wl12xx: define wl12xx_vif

Define a per-vif data struct.
This struct holds all the vif-specifc data, which is
currently being hold by the global wl struct.

Start by moving the basic_rate_set field into it.

NOTE: in order to make the patches a bit smaller, start by
using wl->vif in some functions, instead of changing all
the function prototypes at once. finally, wl->vif will be
removed altogether.

Signed-off-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>
diff --git a/drivers/net/wireless/wl12xx/init.h b/drivers/net/wireless/wl12xx/init.h
index 64320c0..81140b8 100644
--- a/drivers/net/wireless/wl12xx/init.h
+++ b/drivers/net/wireless/wl12xx/init.h
@@ -34,7 +34,7 @@
 int wl1271_chip_specific_init(struct wl1271 *wl);
 int wl1271_hw_init(struct wl1271 *wl);
 int wl1271_init_vif_specific(struct wl1271 *wl, struct ieee80211_vif *vif);
-int wl1271_init_ap_rates(struct wl1271 *wl);
+int wl1271_init_ap_rates(struct wl1271 *wl, struct wl12xx_vif *wlvif);
 int wl1271_ap_init_templates(struct wl1271 *wl, struct ieee80211_vif *vif);
 
 #endif