staging: rtl8712: r8712_free_xmitbuf(): Change return type

Change return type of r8712_free_xmitbuf from int to void (and remove
its return values) as its return value is never used.
Signed-off-by: Nishka Dasgupta <nishkadg.linux@gmail.com>
Link: https://lore.kernel.org/r/20190809052353.5308-5-nishkadg.linux@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8712/rtl871x_xmit.c

@@ -753,19 +753,18 @@ struct xmit_buf *r8712_alloc_xmitbuf(struct xmit_priv *pxmitpriv)
 	return pxmitbuf;
 }
 
-int r8712_free_xmitbuf(struct xmit_priv *pxmitpriv, struct xmit_buf *pxmitbuf)
+void r8712_free_xmitbuf(struct xmit_priv *pxmitpriv, struct xmit_buf *pxmitbuf)
 {
 	unsigned long irqL;
 	struct  __queue *pfree_xmitbuf_queue = &pxmitpriv->free_xmitbuf_queue;
 
 	if (pxmitbuf == NULL)
-		return _FAIL;
+		return;
 	spin_lock_irqsave(&pfree_xmitbuf_queue->lock, irqL);
 	list_del_init(&pxmitbuf->list);
 	list_add_tail(&(pxmitbuf->list), &pfree_xmitbuf_queue->queue);
 	pxmitpriv->free_xmitbuf_cnt++;
 	spin_unlock_irqrestore(&pfree_xmitbuf_queue->lock, irqL);
-	return _SUCCESS;
 }
 
 /*

drivers/staging/rtl8712/rtl871x_xmit.h

@@ -249,7 +249,7 @@ struct	xmit_priv {
 	uint free_xmitbuf_cnt;
 };
 
-int r8712_free_xmitbuf(struct xmit_priv *pxmitpriv,
+void r8712_free_xmitbuf(struct xmit_priv *pxmitpriv,
 			struct xmit_buf *pxmitbuf);
 struct xmit_buf *r8712_alloc_xmitbuf(struct xmit_priv *pxmitpriv);
 void r8712_update_protection(struct _adapter *padapter, u8 *ie, uint ie_len);