sunvnet: vnet_port_remove must call unregister_netdev

[ Upstream commit aabb9875 ]

The missing call to unregister_netdev() leaves the interface active
after the driver is unloaded by rmmod.
Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

drivers/net/ethernet/sun/sunvnet.c

@@ -1248,6 +1248,8 @@ static int vnet_port_remove(struct vio_dev *vdev)
 		dev_set_drvdata(&vdev->dev, NULL);
 
 		kfree(port);
+
+		unregister_netdev(vp->dev);
 	}
 	return 0;
 }