accel/amdxdna: Fix notifier_wq flushing warning

accel/amdxdna: Fix notifier_wq flushing warning

Create notifier_wq with WQ_MEM_RECLAIM flag to fix the possible warning.

  workqueue: WQ_MEM_RECLAIM amdxdna_js:drm_sched_free_job_work [gpu_sched] is flushing !WQ_MEM_RECLAIM notifier_wq:0x0

Fixes: e486147c912f ("accel/amdxdna: Add BO import and export")
Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
Reviewed-by: Maciej Falkowski <maciej.falkowski@linux.intel.com>
Signed-off-by: Lizhi Hou <lizhi.hou@amd.com>
Link: https://patch.msgid.link/20260113173624.256053-1-lizhi.hou@amd.com