staging: rtl8712: remove wrapper function _queue_empty

_queue_empty is an inline wrapper around list_empty.  This patch removes this
wrapper function and instead calls list_empty directly.

Signed-off-by: James A Shackleford <shack@linux.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 73ca66e..e769bb5 100644
--- a/drivers/staging/rtl8712/rtl871x_sta_mgt.c
+++ b/drivers/staging/rtl8712/rtl871x_sta_mgt.c
@@ -121,7 +121,7 @@
 
 	pfree_sta_queue = &pstapriv->free_sta_queue;
 	spin_lock_irqsave(&(pfree_sta_queue->lock), flags);
-	if (_queue_empty(pfree_sta_queue) == true)
+	if (list_empty(&pfree_sta_queue->queue))
 		psta = NULL;
 	else {
 		psta = LIST_CONTAINOR(pfree_sta_queue->queue.next,