staging: rtl8712: rtl87x_io : make use of kzalloc

kmalloc followed by memset can be replaced with kzalloc.
Signed-off-by: Hariprasad Kelam <hariprasad.kelam@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8712/rtl871x_io.c

@@ -107,13 +107,11 @@ uint r8712_alloc_io_queue(struct _adapter *adapter)
 	INIT_LIST_HEAD(&pio_queue->processing);
 	INIT_LIST_HEAD(&pio_queue->pending);
 	spin_lock_init(&pio_queue->lock);
-	pio_queue->pallocated_free_ioreqs_buf = kmalloc(NUM_IOREQ *
+	pio_queue->pallocated_free_ioreqs_buf = kzalloc(NUM_IOREQ *
 						(sizeof(struct io_req)) + 4,
 						GFP_ATOMIC);
 	if ((pio_queue->pallocated_free_ioreqs_buf) == NULL)
 		goto alloc_io_queue_fail;
-	memset(pio_queue->pallocated_free_ioreqs_buf, 0,
-			(NUM_IOREQ * (sizeof(struct io_req)) + 4));
 	pio_queue->free_ioreqs_buf = pio_queue->pallocated_free_ioreqs_buf + 4
 			- ((addr_t)(pio_queue->pallocated_free_ioreqs_buf)
 			& 3);