drm/i915: Replace several IS_METEORLAKE with proper IP version checks

Many of the IS_METEORLAKE conditions throughout the driver are supposed
to be checks for Xe_LPG and/or Xe_LPM+ IP, not for the MTL platform
specifically.  Update those checks to ensure that the code will still
operate properly if/when these IP versions show up on future platforms.

v2:
 - Update two more conditions (one for pg_enable, one for MTL HuC
   compatibility).
v3:
 - Don't change GuC/HuC compatibility check, which sounds like it truly
   is specific to the MTL platform.  (Gustavo)
 - Drop a non-lineage workaround number for the OA timestamp frequency
   workaround.  (Gustavo)

Cc: Gustavo Sousa <gustavo.sousa@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Gustavo Sousa <gustavo.sousa@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230821180619.650007-20-matthew.d.roper@intel.com