staging: rtl8712: braces should be used on all arms

Fix all instances of the following checkpatch.pl check:
CHECK: braces {} should be used on all arms of this statement

Signed-off-by: Luis de Bethencourt <luisbg@osg.samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/staging/rtl8712/rtl871x_sta_mgt.c b/drivers/staging/rtl8712/rtl871x_sta_mgt.c
index 400dfb6..162e61c 100644
--- a/drivers/staging/rtl8712/rtl871x_sta_mgt.c
+++ b/drivers/staging/rtl8712/rtl871x_sta_mgt.c
@@ -117,9 +117,9 @@
 
 	pfree_sta_queue = &pstapriv->free_sta_queue;
 	spin_lock_irqsave(&(pfree_sta_queue->lock), flags);
-	if (list_empty(&pfree_sta_queue->queue))
+	if (list_empty(&pfree_sta_queue->queue)) {
 		psta = NULL;
-	else {
+	} else {
 		psta = LIST_CONTAINOR(pfree_sta_queue->queue.next,
 				      struct sta_info, list);
 		list_del_init(&(psta->list));