Revert "minigbm: align multi-planar formats to 16"

Revert "minigbm: align multi-planar formats to 16"

This reverts commit 6a8828492f4252a7c125a984823599bd65e3cb03.

Revert reason:  intel-vaapi-driver can relax height alignment

alignment is only enforced on tiled surfaced, after confirming
minigbm will provide linear surfaces, surfaces height needs
to be 4 bit aligned.

BUG=b/65272348
TEST="intel-vaapi-driver regular testing, VAVDA, VAVEA, VAJDA"
TEST="minigbm media tests within container"
TEST="tests mentioned in the bug"
CQ-DEPEND=CL:671650

Change-Id: Ifdccca9d7f85be0cbb504c0c0a2b4712aed99826
Signed-off-by: Daniel Charles <daniel.charles@intel.com>
Reviewed-on: https://chromium-review.googlesource.com/685296
Tested-by: Ricky Liang <jcliang@chromium.org>
Reviewed-by: Ricky Liang <jcliang@chromium.org>