net: i825xx: replace dev_kfree_skb_irq by dev_consume_skb_irq for drop profiles

dev_consume_skb_irq() should be called in i596_interrupt() 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/i825xx/lib82596.c

@@ -1194,7 +1194,7 @@ static irqreturn_t i596_interrupt(int irq, void *dev_id)
 				dma_unmap_single(dev->dev.parent,
 						 tx_cmd->dma_addr,
 						 skb->len, DMA_TO_DEVICE);
-				dev_kfree_skb_irq(skb);
+				dev_consume_skb_irq(skb);
 
 				tx_cmd->cmd.command = 0; /* Mark free */
 				break;