drm/i915/xelpmp: Don't assume workarounds extend to future platforms

The currently implemented Xe_LPM+ workarounds are specific to media
version 13.00.  When new IP versions show up in the future, they'll need
their own workaround lists.
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230821180619.650007-13-matthew.d.roper@intel.com

drivers/gpu/drm/i915/gt/intel_workarounds.c

@@ -1711,10 +1711,10 @@ gt_init_workarounds(struct intel_gt *gt, struct i915_wa_list *wal)
 	gt_tuning_settings(gt, wal);
 
 	if (gt->type == GT_MEDIA) {
-		if (MEDIA_VER(i915) >= 13)
+		if (MEDIA_VER_FULL(i915) == IP_VER(13, 0))
 			xelpmp_gt_workarounds_init(gt, wal);
 		else
-			MISSING_CASE(MEDIA_VER(i915));
+			MISSING_CASE(MEDIA_VER_FULL(i915));
 
 		return;
 	}