msm: Handle YVU420_ANDROID and YVU420 identically

With arcvm, virtgpu_cross_domain.c in the host remaps YVU420_ANDROID to
YVU420, to avoid exposing custom DRM_FORMAT_x values in the API between
the host and guest.  Which means it expects identical behavior for both.
Fortunately, we can do this, provided that it is a single level+layer
(minigbm does not allocate anything more complex than non-mipmap 2D),
and not tiled/UBWC.  The latter constraint we can get away with because
NV12 is used for anything produced by hw.

BUG=b:238158981
TEST=cts-tradefed run cts -m CtsVideoTestCases

Change-Id: If1330340f84835643be7cf8cae95026cbcebf273
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/minigbm/+/3774456
Auto-Submit: Rob Clark <robdclark@chromium.org>
Tested-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Yiwei Zhang <zzyiwei@chromium.org>
Commit-Queue: Rob Clark <robdclark@chromium.org>
Commit-Queue: Yiwei Zhang <zzyiwei@chromium.org>