UPSTREAM: scsi: ufs: core: Correct ufshcd_shutdown() flow

After ufshcd_wl_shutdown() set device power off and link off,
ufshcd_shutdown() could turn off clock/power. Also remove
pm_runtime_get_sync.

The reason why it is safe to remove pm_runtime_get_sync() is because:

 - ufshcd_wl_shutdown() -> pm_runtime_get_sync() will resume hba->dev too.

 - device resume(turn on clk/power) is not required, even if device is in
   RPM_SUSPENDED.

Bug: 254441685
Link: https://lore.kernel.org/r/20220727030526.31022-1-peter.wang@mediatek.com


Fixes: b294ff3e ("scsi: ufs: core: Enable power management for wlun")
Cc: <stable@vger.kernel.org> # 5.15.x
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Peter Wang <peter.wang@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
(cherry picked from commit 00511d2a)
Signed-off-by: Lee Jones <joneslee@google.com>
Change-Id: I0b4e365484af5dcc432a2905c2775218becafdfa