cfg80211: Clear "beacon_found" on regulatory restore

Restore the default state to the "beacon_found" flag when
the channel flags are restored.  Otherwise, we can end up
with a channel that we can no longer transmit on even when
we can see beacons on that channel.

Signed-off-by: Paul Stewart <pstew@chromium.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index cbf30de..2ded3c7 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -1901,6 +1901,7 @@
 			chan->flags = chan->orig_flags;
 			chan->max_antenna_gain = chan->orig_mag;
 			chan->max_power = chan->orig_mpwr;
+			chan->beacon_found = false;
 		}
 	}
 }