net: 8139too: remove unnecessary pci_set_drvdata()

The driver core clears the driver data to NULL after device_release
or on probe failure. Thus, it is not needed to manually clear the
device driver data to NULL.

Signed-off-by: Jingoo Han <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/ethernet/realtek/8139too.c

···
 	pci_release_regions (pdev);
 
 	free_netdev(dev);
-	pci_set_drvdata (pdev, NULL);
 }