wireless: ipw2100: 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: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ipw2x00/ipw2100.c

@@ -6362,7 +6362,6 @@ static int ipw2100_pci_init_one(struct pci_dev *pci_dev,
 				   &ipw2100_attribute_group);
 
 		free_libipw(dev, 0);
-		pci_set_drvdata(pci_dev, NULL);
 	}
 
 	pci_iounmap(pci_dev, ioaddr);