exynos4: getphys implementation on buffermanager for samsung omx

Change-Id: Iee665f56aaf601479d796703db983ca5fce9c5c3
exynos4: ui: define USAGE_HW_FIMC1 to support gralloc

Source:
http://git.insignal.co.kr/samsung/exynos/android/platform/frameworks/native/commit/?h=exynos-jb&id=5179fef67cadaa10d72cfe6764629565bc9a1e4e

Change-Id: Id194446eb332869f677dfb7e94c73aa3f52ee4b0