rtc: rtc-palmas: make of_device_id array const

Make of_device_id array const, because all OF functions handle it as
const.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/rtc/rtc-palmas.c

@@ -352,7 +352,7 @@ static SIMPLE_DEV_PM_OPS(palmas_rtc_pm_ops, palmas_rtc_suspend,
 			 palmas_rtc_resume);
 
 #ifdef CONFIG_OF
-static struct of_device_id of_palmas_rtc_match[] = {
+static const struct of_device_id of_palmas_rtc_match[] = {
 	{ .compatible = "ti,palmas-rtc"},
 	{ },
 };