mac80211: use list_move instead of list_del/list_add

Using list_move() instead of list_del() + list_add().

spatch with a semantic match is used to found this problem.
(http://coccinelle.lip6.fr/)
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

net/mac80211/offchannel.c

@@ -233,8 +233,7 @@ static void ieee80211_hw_roc_start(struct work_struct *work)
 			u32 dur = dep->duration;
 			dep->duration = dur - roc->duration;
 			roc->duration = dur;
-			list_del(&dep->list);
-			list_add(&dep->list, &roc->list);
+			list_move(&dep->list, &roc->list);
 		}
 	}
  out_unlock: