This is a set of very nice, complete helpers for moving around bits in
various formats, and we want to retain its behavior when deduplicating
Mesa's format pack/unpack and gallium's.
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6297>
