BACKPORT: FROMLIST: scsi: ufs: Make the polling code report which command has been completed

Prepare for introducing a new __ufshcd_poll() caller that will need to
know whether or not a specific command has been completed.

Bug: 312786487
Bug: 326329246
Bug: 333069246
Bug: 333317508
Link: https://lore.kernel.org/linux-scsi/20240416171357.1062583-1-bvanassche@acm.org/T/#m68901e4f4e2437e7d0cb747049006ab19f57e038


Change-Id: I1b25b095b4bf9fbf175aa963ec85fcbbcb2be0ed
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Bart Van Assche <bvanassche@google.com>