drm/panfrost: Remove commented out call to panfrost_core_dump

panfrost_core_dump() has never existed in mainline, so remove it and add
a TODO entry that core dump support is currently lacking.
Signed-off-by: Steven Price <steven.price@arm.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20191009094456.9704-2-steven.price@arm.com

drivers/gpu/drm/panfrost/TODO

@@ -10,3 +10,5 @@
 
 - Compute job support. So called 'compute only' jobs need to be plumbed up to
   userspace.
+
+- Support core dump on job failure

drivers/gpu/drm/panfrost/panfrost_job.c

@@ -404,8 +404,6 @@ static void panfrost_job_timedout(struct drm_sched_job *sched_job)
 	}
 	spin_unlock_irqrestore(&pfdev->js->job_lock, flags);
 
-	/* panfrost_core_dump(pfdev); */
-
 	panfrost_devfreq_record_transition(pfdev, js);
 	panfrost_device_reset(pfdev);