ARM: SAMSUNG: Fix warning 's3c_pm_show_resume_irqs' defined but not used

s3c_pm_show_resume_irqs() is used by some s3c_pm_arch_show_resume_irqs()
implementations, which get included through mach/pm-core.h. Add __maybe_unused
to silence warnings when it isn't used (e.g. on S3C64XX platforms).
Signed-off-by: NMaurus Cuelenaere <mcuelenaere@gmail.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

arch/arm/plat-samsung/pm.c

@@ -214,8 +214,9 @@ void s3c_pm_do_restore_core(struct sleep_save *ptr, int count)
  *
  * print any IRQs asserted at resume time (ie, we woke from)
 */
-static void s3c_pm_show_resume_irqs(int start, unsigned long which,
-				    unsigned long mask)
+static void __maybe_unused s3c_pm_show_resume_irqs(int start,
+						   unsigned long which,
+						   unsigned long mask)
 {
 	int i;