drm/xe: Do not reference loop variable directly

Do not reference the loop variable job after the loop has exited.
Instead, save the job from the last iteration of the loop.

Fixes: 3d98a71 ("drm/xe/vf: Start re-emission from first unsignaled job during VF migration")
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Closes: https://lore.kernel.org/r/202511291102.jnnKP6IB-lkp@intel.com/
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Dnyaneshwar Bhadane <dnyaneshwar.bhadane@intel.com>
Link: https://patch.msgid.link/20251203011809.968893-1-matthew.brost@intel.com
(cherry picked from commit 76ce231)
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>

Author: mbrost05

drivers/gpu/drm/xe/xe_guc_submit.c

@@ -2253,10 +2253,11 @@ static void guc_exec_queue_unpause_prepare(struct xe_guc *guc,
 					   struct xe_exec_queue *q)
 {
 	struct xe_gpu_scheduler *sched = &q->guc->sched;
-	struct xe_sched_job *job = NULL;
+	struct xe_sched_job *job = NULL, *__job;
 	bool restore_replay = false;
 
-	list_for_each_entry(job, &sched->base.pending_list, drm.list) {
+	list_for_each_entry(__job, &sched->base.pending_list, drm.list) {
+		job = __job;
 		restore_replay |= job->restore_replay;
 		if (restore_replay) {
 			xe_gt_dbg(guc_to_gt(guc), "Replay JOB - guc_id=%d, seqno=%d",