drm/xe: Fold GEN11_MOCS_ENTRIES into gen12_mocs_desc

drm/xe: Fold GEN11_MOCS_ENTRIES into gen12_mocs_desc

GEN11_MOCS_ENTRIES dates back from importing the table from the i915
module. The macro was used so the it could be maintained in a single
place and platforms would just override with additional entries.

With the platforms supported by xe, each of them is just defining
individual tables without re-using this define. Move it inside
gen12_mocs_desc that is the only user.

Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://lore.kernel.org/r/20231117174049.527192-1-lucas.demarchi@intel.com
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>