ARM: S3C24XX: Move irq syscore-ops to irq-pm

With this the definition of s3c24xx_irq_syscore_ops can also move to
common.h from plat/pm.h and the definitions of s3c24xx_irq_suspend
and s3c24xx_irq_resume are also not necessary anymore in plat/pm.h

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
diff --git a/arch/arm/mach-s3c24xx/common.h b/arch/arm/mach-s3c24xx/common.h
index c2f596e..ed6276f 100644
--- a/arch/arm/mach-s3c24xx/common.h
+++ b/arch/arm/mach-s3c24xx/common.h
@@ -15,4 +15,6 @@
 void s3c2410_restart(char mode, const char *cmd);
 void s3c244x_restart(char mode, const char *cmd);
 
+extern struct syscore_ops s3c24xx_irq_syscore_ops;
+
 #endif /* __ARCH_ARM_MACH_S3C24XX_COMMON_H */