net: sis: replace dev_kfree_skb_irq by dev_consume_skb_irq for drop profiles

dev_consume_skb_irq() should be called when skb xmit done. It makes
drop profiles(dropwatch, perf) more friendly.
Signed-off-by: Yang Wei <yang.wei9@zte.com.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/sis/sis190.c

@@ -714,7 +714,7 @@ static void sis190_tx_interrupt(struct net_device *dev,
 
 		sis190_unmap_tx_skb(tp->pci_dev, skb, txd);
 		tp->Tx_skbuff[entry] = NULL;
-		dev_kfree_skb_irq(skb);
+		dev_consume_skb_irq(skb);
 	}
 
 	if (tp->dirty_tx != dirty_tx) {

drivers/net/ethernet/sis/sis900.c

@@ -1927,7 +1927,7 @@ static void sis900_finish_xmit (struct net_device *net_dev)
 		pci_unmap_single(sis_priv->pci_dev,
 			sis_priv->tx_ring[entry].bufptr, skb->len,
 			PCI_DMA_TODEVICE);
-		dev_kfree_skb_irq(skb);
+		dev_consume_skb_irq(skb);
 		sis_priv->tx_skbuff[entry] = NULL;
 		sis_priv->tx_ring[entry].bufptr = 0;
 		sis_priv->tx_ring[entry].cmdsts = 0;