drm/xe: Move page fault init after topology init

We need the topology to determine GT page fault queue size, move page
fault init after topology init.

Cc: stable@vger.kernel.org
Fixes: 3338e4f90c ("drm/xe: Use topology to determine page fault queue size")
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
Reviewed-by: Stuart Summers <stuart.summers@intel.com>
Link: https://lore.kernel.org/r/20250710191208.1040215-1-matthew.brost@intel.com

drivers/gpu/drm/xe/xe_gt.c

@@ -628,10 +628,6 @@ int xe_gt_init(struct xe_gt *gt)
 	if (err)
 		return err;
 
-	err = xe_gt_pagefault_init(gt);
-	if (err)
-		return err;
-
 	err = xe_gt_sysfs_init(gt);
 	if (err)
 		return err;
@@ -640,6 +636,10 @@ int xe_gt_init(struct xe_gt *gt)
 	if (err)
 		return err;
 
+	err = xe_gt_pagefault_init(gt);
+	if (err)
+		return err;
+
 	err = xe_gt_idle_init(&gt->gtidle);
 	if (err)
 		return err;