sh: convert processor device setup functions to arch_initcall()

Convert the processor platform device setup
functions from __initcall() and sometimes
device_initcall() to arch_initcall().

This makes sure that the platform devices are
registered a bit earlier so the devices are
available when drivers register using initcall
levels earlier than device_initcall().

A good example is platform devices needed by
i2c-sh_mobile.c which registers a bit earlier
using subsys_initcall().

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/kernel/cpu/sh2a/setup-mxg.c

@@ -238,7 +238,7 @@ static int __init mxg_devices_setup(void)
 	return platform_add_devices(mxg_devices,
 				    ARRAY_SIZE(mxg_devices));
 }
-__initcall(mxg_devices_setup);
+arch_initcall(mxg_devices_setup);
 
 void __init plat_irq_setup(void)
 {