[NETCONSOLE]: Clean up initcall warning.

From: Matt Mackall <mpm@selenic.com>

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

Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/netconsole.c b/drivers/net/netconsole.c
index 66e74f7..bf58db2 100644
--- a/drivers/net/netconsole.c
+++ b/drivers/net/netconsole.c
@@ -107,7 +107,7 @@
 
 	if(!configured) {
 		printk("netconsole: not configured, aborting\n");
-		return -EINVAL;
+		return 0;
 	}
 
 	if(netpoll_setup(&np))