wireless: prism54: 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/prism54/islpci_dev.c

@@ -914,7 +914,6 @@ islpci_setup(struct pci_dev *pdev)
       do_islpci_free_memory:
 	islpci_free_memory(priv);
       do_free_netdev:
-	pci_set_drvdata(pdev, NULL);
 	free_netdev(ndev);
 	priv = NULL;
 	return NULL;

drivers/net/wireless/prism54/islpci_hotplug.c

@@ -199,7 +199,6 @@ prism54_probe(struct pci_dev *pdev, const struct pci_device_id *id)
       do_unregister_netdev:
 	unregister_netdev(ndev);
 	islpci_free_memory(priv);
-	pci_set_drvdata(pdev, NULL);
 	free_netdev(ndev);
 	priv = NULL;
       do_pci_clear_mwi:
@@ -247,7 +246,6 @@ prism54_remove(struct pci_dev *pdev)
 	/* free the PCI memory and unmap the remapped page */
 	islpci_free_memory(priv);
 
-	pci_set_drvdata(pdev, NULL);
 	free_netdev(ndev);
 	priv = NULL;