mac80211: Remove WARN_ON in apply-ht-override logic.

AP interfaces routinely call this logic, so just silently
return when this happens instead of splatting the kernel
logs.
Reported-by: NChristian Lamparter <chunkeey@googlemail.com>
Signed-off-by: NBen Greear <greearb@candelatech.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

net/mac80211/ht.c

@@ -47,7 +47,9 @@ void ieee80211_apply_htcap_overrides(struct ieee80211_sub_if_data *sdata,
 	int i;
 
 	if (sdata->vif.type != NL80211_IFTYPE_STATION) {
-		WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION);
+		/* AP interfaces call this code when adding new stations,
+		 * so just silently ignore non station interfaces.
+		 */
 		return;
 	}