[NETPOLL]: e1000 netpoll tweak

Suggested by Steven Rostedt, matches his patch included in e100.
Signed-off-by: NMatt Mackall <mpm@selenic.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/e1000/e1000_main.c

@@ -3789,6 +3789,7 @@ e1000_netpoll(struct net_device *netdev)
 	struct e1000_adapter *adapter = netdev_priv(netdev);
 	disable_irq(adapter->pdev->irq);
 	e1000_intr(adapter->pdev->irq, netdev, NULL);
+	e1000_clean_tx_irq(adapter);
 	enable_irq(adapter->pdev->irq);
 }
 #endif