mac80211: fix checkpatch errors

Fix a number of different checkpatch errors.

Signed-off-by: Weilong Chen <chenweilong@huawei.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 591b46b..656648b 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -76,7 +76,7 @@
 	}
 
 	if (ieee80211_is_ctl(fc)) {
-		if(ieee80211_is_pspoll(fc))
+		if (ieee80211_is_pspoll(fc))
 			return hdr->addr1;
 
 		if (ieee80211_is_back_req(fc)) {