This will be required for `cl_intel_required_subgroup_size`, but it
already helps implementing OpenCL subgroups as this allows us to check
with every subgroup size when implementing
`CL_KERNEL_LOCAL_SIZE_FOR_SUB_GROUP_COUNT`.
Signed-off-by: Karol Herbst <git@karolherbst.de>
Reviewed-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/22893>