drm/xe/pvc: Don't try to invalidate AuxCCS TLB

Generally !has_flatccs implies that a platform has AuxCCS compression
and thus needs to invalidate the AuxCCS TLB.  However PVC is a special
case because it has no compression of either type (FlatCCS or AuxCCS)
so we should avoid writing to non-existent AuxCCS registers.

Reviewed-by: Haridhar Kalvala <haridhar.kalvala@intel.com>
Link: https://lore.kernel.org/r/20230524192635.673293-1-matthew.d.roper@intel.com


Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>