ARM: s3c24xx: Constify wake_irqs

samsung_sync_wakemask() accepts pointer to const data so wake_irqs can
be made const to increase safeness.
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>

arch/arm/mach-s3c24xx/pm-s3c2412.c

@@ -53,7 +53,7 @@ static int s3c2412_cpu_suspend(unsigned long arg)
 }
 
 /* mapping of interrupts to parts of the wakeup mask */
-static struct samsung_wakeup_mask wake_irqs[] = {
+static const struct samsung_wakeup_mask wake_irqs[] = {
 	{ .irq = IRQ_RTC,	.bit = S3C2412_PWRCFG_RTC_MASKIRQ, },
 };