1.config irq pin for key
	modified:   arch/arm/cpu/armv7/exynos/interrupts.c
	modified:   arch/arm/include/asm/arch-exynos/interrupts.h
	modified:   arch/arm/include/asm/arch-exynos/irqs.h
	modified:   board/samsung/exynos4412/exynos4412.c