[POWERPC] 83xx: mpc837x_rdb: add simple-bus compatible matching

This is needed to probe nor and nand flashes on the localbus.
Signed-off-by: NAnton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

arch/powerpc/platforms/83xx/mpc837x_rdb.c

@@ -46,6 +46,7 @@ static void __init mpc837x_rdb_setup_arch(void)
 static struct of_device_id mpc837x_ids[] = {
 	{ .type = "soc", },
 	{ .compatible = "soc", },
+	{ .compatible = "simple-bus", },
 	{},
 };