mac80211: update BSS info on AC parameters change

When the AC parameters change, drivers might rely
on getting a bss_info_changed notification with
BSS_CHANGED_QOS in addition to the conf_tx call.

Always call the function when userspace updates
are made (in AP/GO modes) and also set the change
flag when updates were made by the AP (in managed
mode.)

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index ccbe241..6a171e2 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -1741,6 +1741,8 @@
 		return -EINVAL;
 	}
 
+	ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
+
 	return 0;
 }