exynos: reorganized and updated from insignal

Changes needed on exynos4210 devices:

libcsc -> libseccscapi
libswconverter -> remove

TARGET_HAL_PATH := hardware/samsung/exynos4/hal
TARGET_OMX_PATH := hardware/samsung/exynos/multimedia/openmax
$(call inherit-product, hardware/samsung/exynos4210.mk)

Change-Id: Ic59ef95b85ef37b3f38fb36cf6a364a5414685ee