1.config i2c for exynos4412
2.modify cmd:pmic i2c error
	modified:   board/samsung/exynos4412/exynos4412.c
	modified:   drivers/power/pmic/pmic_s5m8767a.c
	modified:   drivers/power/power_core.c
	modified:   include/configs/exynos4412.h