ARM: EXYNOS: cleanup <mach/regs-irq.h>

Remove useless inclusion <mach/regs-irq.h> for exynos.

Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
diff --git a/arch/arm/plat-samsung/s5p-irq-pm.c b/arch/arm/plat-samsung/s5p-irq-pm.c
index 7c1e3b7..5914980 100644
--- a/arch/arm/plat-samsung/s5p-irq-pm.c
+++ b/arch/arm/plat-samsung/s5p-irq-pm.c
@@ -22,7 +22,10 @@
 #include <mach/map.h>
 
 #include <mach/regs-gpio.h>
+
+#ifndef CONFIG_ARCH_EXYNOS
 #include <mach/regs-irq.h>
+#endif
 
 /* state for IRQs over sleep */