anv: Enable HiZ on multi-LOD depth buffers.

Initial work by Rafael Antognolli <rafael.antognolli@intel.com>

Reworks
 - Rebase to main
 - Emit the right hiz op for higher mip levels when transitioning the
   depth buffer

Signed-off-by: Rohan Garg <rohan.garg@intel.com>
Reviewed-by: Nanley Chery <nanley.g.chery@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/28629>
2 files changed