The DRM fourcc for this format is DRM_FORMAT_ABGR16161616 = 'AB48', not
__DRI_IMAGE_FOURCC_RGBA16161616 = 'RA48'. This should have no outward
effect for clients, since the format does not get revealed by
dri2_query_dma_buf_formats, and is otherwise only used within the
library.
Signed-off-by: Manuel Stoeckl <code@mstoeckl.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14580>