drm/xe/pf: Always select Multi-Level LMTT for platforms 12.60+

drm/xe/pf: Always select Multi-Level LMTT for platforms 12.60+

The Multi-Level LMTT variant is not specific only to the PVC.
Change logic to select it for all new platforms beyond 12.60.

Bspec: 52404, 67468
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Michał Winiarski <michal.winiarski@intel.com>
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240313104132.1045-4-michal.wajdeczko@intel.com
Signed-off-by: Michał Winiarski <michal.winiarski@intel.com>