Revert "libui: exynos4: apply FIMC usage flag on format HAL_PIXEL_FORMAT_YCb...."

This reverts commit 8cd26538bcf71ebdb922bcef69d1eed13fcad012.
Revert "GraphicBuffer: exynos4: set FIMC1 usage bit on samsung specific formats, ty rmcc"

This reverts commit 3555d32b7f82201bfb7f5af264bc295b1d2df882.
Revert "ui: exynos4: getphys is common, ty rmcc"

This reverts commit f7f39b053de9e1c8b2e563330bbdae88251f3c66.
Revert "exynos4: ui: define USAGE_HW_FIMC1 to support gralloc, ty codeworkx"

This reverts commit cc6c50b3724f9a01c1c53614db58eaeccb5b386a.