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>

arch/arm/mach-ux500/pm_domains.c

@@ -49,7 +49,7 @@ static struct generic_pm_domain *ux500_pm_domains[NR_DOMAINS] = {
 	[DOMAIN_VAPE] = &ux500_pm_domain_vape,
 };
 
-static struct of_device_id ux500_pm_domain_matches[] = {
+static const struct of_device_id ux500_pm_domain_matches[] __initconst = {
 	{ .compatible = "stericsson,ux500-pm-domains", },
 	{ },
 };