mac80211: use HWSIM_STA_MAGIC in hwsim_check_sta_magic() and hwsim_set_sta_magic().

This patch fixes a typo in mac80211_hwsim.c:
use HWSIM_STA_MAGIC in hwsim_check_sta_magic() and hwsim_set_sta_magic()
instead of HWSIM_VIF_MAGIC.
Signed-off-by: Rami Rosen <ramirose@gmail.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/mac80211_hwsim.c

@@ -63,13 +63,13 @@ struct hwsim_sta_priv {
 static inline void hwsim_check_sta_magic(struct ieee80211_sta *sta)
 {
 	struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
-	WARN_ON(sp->magic != HWSIM_VIF_MAGIC);
+	WARN_ON(sp->magic != HWSIM_STA_MAGIC);
 }
 
 static inline void hwsim_set_sta_magic(struct ieee80211_sta *sta)
 {
 	struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
-	sp->magic = HWSIM_VIF_MAGIC;
+	sp->magic = HWSIM_STA_MAGIC;
 }
 
 static inline void hwsim_clear_sta_magic(struct ieee80211_sta *sta)