There's no good reason for this to be header-only besides laziness on my
part when I first wrote a few "small" helpers. Some of those are pretty
good sized and don't need to be inlined.
Keeping the original copyright since this is just moving code.
Reviewed-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/28793>
