Revert "minigbm: add support for HAL_PIXEL_FORMAT_RGBA_FP16"

This reverts commit 292da5365a373a8e1eed603fc3aa16e3595d8252.

Reason for revert: The Android framework uses successful allocation of HAL_PIXEL_FORMAT_RGBA_FP16 to test for wide-gamut capabilities.  We don't want to advertise this, so let's revert.

android.graphics.cts.BitmapColorSpaceTest#test16bitHardware

can pass if the framework falls back to RGBA8888, as is the plan.

Original change's description:
> minigbm: add support for HAL_PIXEL_FORMAT_RGBA_FP16
>
> This is needed to support the following CTS test:
>
> android.graphics.cts.BitmapColorSpaceTest#test16bitHardware
>
> There have been some rumblings about adding 64-bit formats to <drm_fourcc.h>:
>
> https://lists.freedesktop.org/archives/intel-gvt-dev/2017-July/001469.html
>
> However, nothing has landed, so let's just define our own format
> for the time being.
>
> BUG=b:77973662
> TEST=Compile for kevin and kevin-arcnext
>      Unfortunately, my P setup refuses to work, so let the lab
>      test.
>
> Change-Id: I1fea16400ba6632a8ef17105e27bc7799d2af515
> Reviewed-on: https://chromium-review.googlesource.com/1029355
> Commit-Ready: Gurchetan Singh <gurchetansingh@chromium.org>
> Tested-by: Gurchetan Singh <gurchetansingh@chromium.org>
> Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>

Bug: b:77973662
Change-Id: I9e4b79b06dd565189a2e783e8453f08af173d84c
Reviewed-on: https://chromium-review.googlesource.com/1045805
Commit-Ready: Gurchetan Singh <gurchetansingh@chromium.org>
Tested-by: Gurchetan Singh <gurchetansingh@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>
8 files changed