scsi: ufs: core: Only suspend clock scaling if scaling down

If clock scale up and suspend clock scaling, ufs will keep high
performance/power mode but no read/write requests on going.  It is logic
wrong and have power concern.

Signed-off-by: Peter Wang <peter.wang@mediatek.com>
Link: https://lore.kernel.org/r/20230831130826.5592-2-peter.wang@mediatek.com


Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>