scsi: ufs: host: mediatek: Change ref-clk timeout policy

Update the timeout policy for ref-clk control.

 - If a clock-on operation times out, it is assumed that the clock is
   off. The system will notify TFA to perform clock-off settings.

 - If a clock-off operation times out, it is assumed that the clock will
   eventually turn off. The 'ref_clk_enabled' flag is set directly.

Signed-off-by: Peter Wang <peter.wang@mediatek.com>
Link: https://lore.kernel.org/r/20250722030841.1998783-4-peter.wang@mediatek.com


Reviewed-by: Chun-Hung Wu <chun-hung.wu@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>