ac/surface,radeonsi: move the set/get_umd_metadata code into ac_surface.c

The indentation is on purpose. The whole file will be reindented to this
code style some other time.

Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4863>
3 files changed