[netdrvr tulip] fix use-after-free

The attached patch fixes an "oops" in tulip driver when a live interface
is deactivated (i.e. PC Card ejected or module unloaded) without being
brought down first.

drivers/net/tulip/tulip_core.c

@@ -1761,11 +1761,11 @@ static void __devexit tulip_remove_one (struct pci_dev *pdev)
 		return;
 
 	tp = netdev_priv(dev);
+	unregister_netdev(dev);
 	pci_free_consistent (pdev,
 			     sizeof (struct tulip_rx_desc) * RX_RING_SIZE +
 			     sizeof (struct tulip_tx_desc) * TX_RING_SIZE,
 			     tp->rx_ring, tp->rx_ring_dma);
-	unregister_netdev (dev);
 	if (tp->mtable)
 		kfree (tp->mtable);
 #ifndef USE_IO_OPS