drm/xe/xelpg: Recognize graphics version 12.74 as Xe_LPG

drm/xe/xelpg: Recognize graphics version 12.74 as Xe_LPG

Graphics version 12.74 (which is technically called "Xe_LPG+") should be
handled the same as versions Xe_LPG 12.70/12.71 by the KMD.  Only the
workaround lists (handled in the next patch) will be a bit different.

Bspec: 55420
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Dnyaneshwar Bhadane <dnyaneshwar.bhadane@intel.com>
Reviewed-by: Matt Atwood <matthew.s.atwood@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240229070806.3402641-2-dnyaneshwar.bhadane@intel.com