scsi: ufs: core: Start the RTC update work later

scsi: ufs: core: Start the RTC update work later

The RTC update work involves runtime resuming the UFS controller. Hence,
only start the RTC update work after runtime power management in the UFS
driver has been fully initialized. This patch fixes the following kernel
crash:

Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP
Workqueue: events ufshcd_rtc_work
Call trace:
 _raw_spin_lock_irqsave+0x34/0x8c (P)
 pm_runtime_get_if_active+0x24/0x9c (L)
 pm_runtime_get_if_active+0x24/0x9c
 ufshcd_rtc_work+0x138/0x1b4
 process_one_work+0x148/0x288
 worker_thread+0x2cc/0x3d4
 kthread+0x110/0x114
 ret_from_fork+0x10/0x20

Reported-by: Neil Armstrong <neil.armstrong@linaro.org>
Closes: https://lore.kernel.org/linux-scsi/0c0bc528-fdc2-4106-bc99-f23ae377f6f5@linaro.org/
Fixes: 6bf999e0eb41 ("scsi: ufs: core: Add UFS RTC support")
Cc: Bean Huo <beanhuo@micron.com>
Cc: stable@vger.kernel.org
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20241031212632.2799127-1-bvanassche@acm.org
Reviewed-by: Peter Wang <peter.wang@mediatek.com>
Reviewed-by: Bean Huo <beanhuo@micron.com>
Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8650-HDK
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>