scsi: ufs: mediatek: Support vops pre suspend to disable auto-hibern8

Mediatek UFS needs auto-hibern8 disabled before suspend. Introduce a
solution to do pre-suspend before SSU (sleep).

Link: https://lore.kernel.org/r/20211006054705.21885-1-peter.wang@mediatek.com
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Bean Huo <beanhuo@micron.com>
Signed-off-by: Peter Wang <peter.wang@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>