net: niu: 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: NJingoo Han <jg1.han@samsung.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/sun/niu.c

@@ -9875,7 +9875,6 @@ static int niu_pci_init_one(struct pci_dev *pdev,
 
 err_out_disable_pdev:
 	pci_disable_device(pdev);
-	pci_set_drvdata(pdev, NULL);
 
 	return err;
 }
@@ -9900,7 +9899,6 @@ static void niu_pci_remove_one(struct pci_dev *pdev)
 		free_netdev(dev);
 		pci_release_regions(pdev);
 		pci_disable_device(pdev);
-		pci_set_drvdata(pdev, NULL);
 	}
 }