drm/xe/xelpg: Extend Wa_14019877138 for Graphics 12.70/71

Wa_14019877138 is also needed for xe_lpg graphics 12.70/71

Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Tejas Upadhyay <tejas.upadhyay@intel.com>