turnip: workaround for a630 d24_unorm_s8_uint fails

A630 doesn't have the HW format we use to sample stencil, so it needs a
workaround. It also has a bug around the AS_R8G8B8A8 format, which doesn't
work when UBWC is disabled, so use 8_8_8_8_UNORM instead when UBWC is
disabled (using AS_R8G8B8A8 or 8_8_8_8_UNORM should only matter with UBWC)

Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5438>
9 files changed