r6040: remove duplicate call to the pci_set_drvdata

pci_set_drvdata is called twice at the remove path of driver,
call it once.
Signed-off-by: NDevendra Naga <devendra.aaru@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/rdc/r6040.c

@@ -1256,7 +1256,6 @@ static void __devexit r6040_remove_one(struct pci_dev *pdev)
 	kfree(lp->mii_bus->irq);
 	mdiobus_free(lp->mii_bus);
 	netif_napi_del(&lp->napi);
-	pci_set_drvdata(pdev, NULL);
 	pci_iounmap(pdev, lp->base);
 	pci_release_regions(pdev);
 	free_netdev(dev);