mac80211: notify driver of rate control updates

Devices that have internal rate control need to be
notified when the bandwidth or SMPS state changes
just like external rate control algorithms get a
notification now.

Add this notification and clarify the change bits
while at it, the HT_CHANGED bit really meant only
bandwidth changed.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 594af5f..4974f99 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -219,7 +219,7 @@
 			sta->sta.ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 
 		rate_control_rate_update(local, sband, sta,
-					 IEEE80211_RC_HT_CHANGED);
+					 IEEE80211_RC_BW_CHANGED);
 	}
 	mutex_unlock(&local->sta_mtx);