Revert "media/gpu/v4l2vd: Reallocate OUTPUT buffers if needed on resolution change"

This reverts commit ad7718f78afcc9e022ff2e106b830c77dd3c7485.

Reason for revert: This breaks stateful V4L2 decoders (such as on trodgor and strongbad). Since this CL fixes a corner case with the rkvdec kernel driver that is already worked around, it is safe to revert.

Original change's description:
> media/gpu/v4l2vd: Reallocate OUTPUT buffers if needed on resolution change
>
> Some V4L2 stateless decoder kernel drivers override the buffer size we
> request. This likely results in a tiny buffer size due to the initial
> minimal frame size. Attempting to use the same buffers after a dynamic
> resolution change would fail if the next coded frame does not fit in
> the old buffer.
>
> To fix this, after the new resolution is applied, check if the returned
> buffer size in `sizeimage` is larger than the buffers we currently hold.
> If so, return the old buffers and request new ones.
>
> BUG=b:202919860
> TEST=Run vda_tests with test-25fps.h264 on Kevin -kernelnext without
>      crrev.com/c/3211697
>      (also need to manually swap /dev/media-dec[01] for now)
>
> R=​frkoenig, mcasas
>
> Change-Id: Ic68e5c33f1d0f60a61128e2bffa0d0c6f7f701d8
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3220949
> Auto-Submit: Chen-Yu Tsai <wenst@chromium.org>
> Commit-Queue: Miguel Casas <mcasas@chromium.org>
> Reviewed-by: Miguel Casas <mcasas@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#934217}

Bug: b:202919860
Bug: b:204376269
Change-Id: I71e98b7a7ebde9b6a6ab8664062c785eef408f66
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3261886
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Reviewed-by: Kazuhiro Inaba <kinaba@chromium.org>
Reviewed-by: Miguel Casas <mcasas@chromium.org>
Commit-Queue: Miguel Casas <mcasas@chromium.org>
Cr-Commit-Position: refs/heads/main@{#938842}