minigbm/msm: Double pitch alignment for YUV

minigbm/msm: Double pitch alignment for YUV

Something somewhere is assuming the UV pitch can be half of the Y pitch,
leading to failures with CtsMediaTestCases#android.media.cts.DecodeAccuracyTest

To componsate, double the pitch alignment requirement for YUV formats.

BUG=b:159504968, b:165333514
TEST=run CtsMediaTestCases#android.media.cts.DecodeAccuracyTest

Change-Id: I0118d813576654c72ed55500d741cf07a1977b20
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/minigbm/+/2568395
Commit-Queue: Rob Clark <robdclark@chromium.org>
Commit-Queue: Kristian H. Kristensen <hoegsberg@chromium.org>
Tested-by: Rob Clark <robdclark@chromium.org>
Auto-Submit: Rob Clark <robdclark@chromium.org>
Reviewed-by: Kristian H. Kristensen <hoegsberg@chromium.org>
Reviewed-by: Alexandre Courbot <acourbot@chromium.org>