drivers/rtc/rtc-sa1100.c: 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-sa1100.c

@@ -338,7 +338,7 @@ static SIMPLE_DEV_PM_OPS(sa1100_rtc_pm_ops, sa1100_rtc_suspend,
 			sa1100_rtc_resume);
 
 #ifdef CONFIG_OF
-static struct of_device_id sa1100_rtc_dt_ids[] = {
+static const struct of_device_id sa1100_rtc_dt_ids[] = {
 	{ .compatible = "mrvl,sa1100-rtc", },
 	{ .compatible = "mrvl,mmp-rtc", },
 	{}