anv: Generalize some aux usage checks

anv: Generalize some aux usage checks

For the checks dealing with fast-clear values, we change them to check
for the depth aspect because the distinction there really is between
color and depth more than between HiZ and CCS.

Reviewed-by: Rafael Antognolli <rafael.antognolli@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4100>