NULL noise in drivers/net

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/mac89x0.c b/drivers/net/mac89x0.c
index a19b595..2a66e5b 100644
--- a/drivers/net/mac89x0.c
+++ b/drivers/net/mac89x0.c
@@ -289,7 +289,7 @@
 	err = register_netdev(dev);
 	if (err)
 		goto out1;
-	return 0;
+	return NULL;
 out1:
 	nubus_writew(0, dev->base_addr + ADD_PORT);
 out: