[NETCONSOLE]: Clean up initcall warning.

From: Matt Mackall <[e-mail]>

netconsole is being wrong here. If it wasn't enabled there's no error.

Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/netconsole.c

···
 
 	if(!configured) {
 		printk("netconsole: not configured, aborting\n");
-		return -EINVAL;
+		return 0;
 	}
 
 	if(netpoll_setup(&np))