e1000e: Save irq into netdev structure

Set net->devirq to pdev->irq.  This should be consistent with other
drivers.
Signed-off-by: Tom Herbert <therbert@google.com>
Acked-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/e1000e/netdev.c

@@ -5440,6 +5440,8 @@ static int __devinit e1000_probe(struct pci_dev *pdev,
 
 	SET_NETDEV_DEV(netdev, &pdev->dev);
 
+	netdev->irq = pdev->irq;
+
 	pci_set_drvdata(pdev, netdev);
 	adapter = netdev_priv(netdev);
 	hw = &adapter->hw;