scsi: ufs: ufs-mediatek: Support performance boosting

Add pm-qos request to support performance boosting in MediaTek UFS
platforms.

At the same time, adjust the order of function calls to be symmetric during
the low-power control flow.

Link: https://lore.kernel.org/r/20220623035052.18802-8-stanley.chu@mediatek.com


Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Peter Wang <peter.wang@mediatek.com>
Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>