sfc: Fix missing cleanup in failure path of efx_pci_probe()

We need to clear the private data pointer in the PCI device.
Also reorder cleanup in efx_pci_remove() for symmetry.
Signed-off-by: NBen Hutchings <bhutchings@solarflare.com>

drivers/net/ethernet/sfc/efx.c

@@ -2497,8 +2497,8 @@ static void efx_pci_remove(struct pci_dev *pci_dev)
 	efx_fini_io(efx);
 	netif_dbg(efx, drv, efx->net_dev, "shutdown successful\n");
 
-	pci_set_drvdata(pci_dev, NULL);
 	efx_fini_struct(efx);
+	pci_set_drvdata(pci_dev, NULL);
 	free_netdev(efx->net_dev);
 };
 
@@ -2700,6 +2700,7 @@ static int __devinit efx_pci_probe(struct pci_dev *pci_dev,
  fail2:
 	efx_fini_struct(efx);
  fail1:
+	pci_set_drvdata(pci_dev, NULL);
 	WARN_ON(rc > 0);
 	netif_dbg(efx, drv, efx->net_dev, "initialisation failed. rc=%d\n", rc);
 	free_netdev(net_dev);