wayland-dma-buf: Add support for DRM_FORMAT_ABGR2101010
It seems to be the preferred format of the Mesa V3D driver on
Raspberry Pi 4. If the compositor doesn't advertise it then Mesa will
fallback from zwp_linux_dmabuf_v1
to wl_drm
, incorrectly. Meaning
it will keep using a buffer with modifiers on an interface that does
not have modifiers.
Add support for DRM_FORMAT_ABGR2101010
. It works, and prevents Mesa
from taking its broken fallback path.
Fixes: #1520 (closed)