Valhall v9 introduces a number of new data structures since Bifrost v7,
and removes a number of traditional data structures. Add decode routines
for the new Valhall data structures, and condition the old routines on
(PAN_ARCH <= 7) to remain buildable and warning-free.
Signed-off-by: Alyssa Rosenzweig <alyssa@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14063>
