scsi: ufs: core: Make the reserved slot a reserved request

scsi: ufs: core: Make the reserved slot a reserved request

Instead of letting the SCSI core allocate hba->nutrs - 1 commands, let
the SCSI core allocate hba->nutrs commands, set the number of reserved
tags to 1 and use the reserved tag for device management commands. This
patch changes the 'reserved slot' from hba->nutrs - 1 into 0 because the
block layer reserves the smallest tags for reserved commands.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://patch.msgid.link/20251031204029.2883185-22-bvanassche@acm.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>