ARM: shmobile: marzen: fixup smsc911x id for regulator

dummy_supplies for smsc911x are registered as "smsc911x".
smsc911x driver needs id = -1
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Simon Horman <horms@verge.net.au>

arch/arm/mach-shmobile/board-marzen.c

@@ -67,7 +67,7 @@ static struct smsc911x_platform_config smsc911x_platdata = {
 
 static struct platform_device eth_device = {
 	.name		= "smsc911x",
-	.id		= 0,
+	.id		= -1,
 	.dev  = {
 		.platform_data = &smsc911x_platdata,
 	},