anv: Fix some depth buffer sampling cases on ICL+

Don't attempt sampling with HiZ if the sampler lacks support for it. On
ICL, the HW docs state that sampling with HiZ is not supported and that
instances of AUX_HIZ in the RENDER_SURFACE_STATE object will be
interpreted as AUX_NONE.

Cc: <mesa-stable@lists.freedesktop.org>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Anuj Phogat <anuj.phogat@gmail.com>
(cherry picked from commit 629806b5)