ARM: make of_device_ids const

of_device_ids (i.e. compatible strings and the respective data) are not
supposed to change at runtime. All functions working with of_device_ids
provided by <linux/of.h> work with const of_device_ids. So mark the
non-const structs in arch/arm as const, too.

While at it also add some __initconst annotations.

Acked-by: Jason Cooper <jason@lakedameon.net>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
diff --git a/arch/arm/mach-exynos/suspend.c b/arch/arm/mach-exynos/suspend.c
index 666ec3e..52e2b1a 100644
--- a/arch/arm/mach-exynos/suspend.c
+++ b/arch/arm/mach-exynos/suspend.c
@@ -587,7 +587,7 @@
 	.cpu_suspend	= exynos5420_cpu_suspend,
 };
 
-static struct of_device_id exynos_pmu_of_device_ids[] = {
+static const struct of_device_id exynos_pmu_of_device_ids[] __initconst = {
 	{
 		.compatible = "samsung,exynos3250-pmu",
 		.data = &exynos3250_pm_data,