cfg80211: respect API on orig_flags on channel for beacon hint

As part of our documented API we always respect the orig_flag
settings on a channel. We forgot to follow this for the beacon
hints.

Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

net/wireless/reg.c

@@ -1070,12 +1070,14 @@ static void handle_reg_beacon(struct wiphy *wiphy,
 	if (likely(chan->center_freq != reg_beacon->chan.center_freq))
 		return;
 
-	if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) {
+	if ((chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) &&
+	    !(chan->orig_flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
 		chan->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
 		REG_DEBUG_BEACON_FLAG("active scanning");
 	}
 
-	if (chan->flags & IEEE80211_CHAN_NO_IBSS) {
+	if ((chan->flags & IEEE80211_CHAN_NO_IBSS) &&
+	    !(chan->orig_flags & IEEE80211_CHAN_NO_IBSS)) {
 		chan->flags &= ~IEEE80211_CHAN_NO_IBSS;
 		REG_DEBUG_BEACON_FLAG("beaconing");
 	}