ARM: S3C64XX: use static declaration when it is not used in other files

Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
diff --git a/arch/arm/mach-s3c64xx/irq-pm.c b/arch/arm/mach-s3c64xx/irq-pm.c
index 8bec61e..0c7e1d9 100644
--- a/arch/arm/mach-s3c64xx/irq-pm.c
+++ b/arch/arm/mach-s3c64xx/irq-pm.c
@@ -96,7 +96,7 @@
 	S3C_PMDBG("%s: IRQ configuration restored\n", __func__);
 }
 
-struct syscore_ops s3c64xx_irq_syscore_ops = {
+static struct syscore_ops s3c64xx_irq_syscore_ops = {
 	.suspend = s3c64xx_irq_pm_suspend,
 	.resume	 = s3c64xx_irq_pm_resume,
 };