Staging: rtl8712: Use del_timer

Use timer API function del_timer instead of driver
specific function _cancel_timer_ex as it is a standard
way for deactivating a timer.

This is done using Coccinelle and semantic patch used for
this is as follows:

@@ expression x; @@
- _cancel_timer_ex (&x);
+ del_timer (&x);
Signed-off-by: Vaishali Thakkar <vthakkar1994@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8712/rtl8712_recv.c

@@ -609,7 +609,7 @@ static int recv_indicatepkt_reorder(struct _adapter *padapter,
 		spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql);
 	} else {
 		spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql);
-		_cancel_timer_ex(&preorder_ctrl->reordering_ctrl_timer);
+		del_timer(&preorder_ctrl->reordering_ctrl_timer);
 	}
 	return _SUCCESS;
 _err_exit: