mac80211: change return value of notifier function

Return NOTIFY_DONE if we don't care this time's notification, return
NOTIFY_OK if we successfully handled this time's notification. That's
the formal way to do it.

Signed-off-by: Zhao, Gang <gamerh2o@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index 5854699..69175f1 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -338,7 +338,7 @@
 
 	sdata_unlock(sdata);
 
-	return NOTIFY_DONE;
+	return NOTIFY_OK;
 }
 #endif
 
@@ -369,7 +369,7 @@
 
 	drv_ipv6_addr_change(local, sdata, idev);
 
-	return NOTIFY_DONE;
+	return NOTIFY_OK;
 }
 #endif