mac80211: remove unnecessary assignment

P2P_DEVICE doesn't support ieee80211_bss_info_change_notify() for now,
so it's not needed to set changed flags for P2P_DEVICE.

Signed-off-by: Zhao, Gang <gamerh2o@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

net/mac80211/util.c

@@ -1671,13 +1671,10 @@ int ieee80211_reconfig(struct ieee80211_local *local)
 			}
 			break;
 		case NL80211_IFTYPE_WDS:
-			break;
 		case NL80211_IFTYPE_AP_VLAN:
 		case NL80211_IFTYPE_MONITOR:
-			/* ignore virtual */
-			break;
 		case NL80211_IFTYPE_P2P_DEVICE:
-			changed = BSS_CHANGED_IDLE;
+			/* nothing to do */
 			break;
 		case NL80211_IFTYPE_UNSPECIFIED:
 		case NUM_NL80211_IFTYPES: