FROMLIST: scsi: ufs: Simplify power management during async scan

ufshcd_init() calls pm_runtime_get_sync() before it calls
async_schedule(). ufshcd_async_scan() calls pm_runtime_put_sync()
directly or indirectly from ufshcd_add_lus(). Simplify
ufshcd_async_scan() by always calling pm_runtime_put_sync() from
ufshcd_async_scan().

Cc: stable@vger.kernel.org
Change-Id: I4b6ede95360c665594963fff0962742728064fb0
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Bug: 310401362
Link: https://lore.kernel.org/linux-scsi/20231218225229.2542156-2-bvanassche@acm.org/


Signed-off-by: Bart Van Assche <bvanassche@google.com>