FROMLIST: scsi: ufs-mediatek: Introduce workaround for power mode change

Some MediaTek SoC chips need special flow for power mode change,
especially for chips supporting HS-G5.

Enable the workaround by setting the host-specific capability.

Bug: 235550312
Link: https://lore.kernel.org/linux-scsi/20220609085751.25305-4-stanley.chu@mediatek.com/


Change-Id: I7da0d429f97f89f1c3b08c683102608e720365a9
Signed-off-by: CC Chou <cc.chou@mediatek.com>
Signed-off-by: Eddie Huang <eddie.huang@mediatek.com>
Signed-off-by: Dennis Yu <tun-yu.yu@mediatek.com>
Signed-off-by: Peter Wang <peter.want@medaitek.com>
Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>