Revert "exynos: gralloc: implement gralloc_lock_ycbcr"

This format is not SW readable

This reverts commit 25ffbfe5e8b51f392fafc1bffb16b6633a8ba3df.

Bug: 19179288
Change-Id: Icbfc098f4a079f32a3809ab9ef9bfcbc509a89ee
2 files changed