scsi: ufs: mcq: Prevent no I/O queue case for MCQ

If hba_maxq equals poll_queues, which means there are no I/O queues
(HCTX_TYPE_DEFAULT, HCTX_TYPE_READ), the very first hw queue will be
allocated as HCTX_TYPE_POLL and it will be used as the dev_cmd_queue.  In
this case, device commands such as QUERY cannot be properly handled.

This patch prevents the initialization of MCQ when the number of I/O queues
is not set and only the number of POLL queues is set.

Signed-off-by: Minwoo Im <minwoo.im@samsung.com>
Link: https://lore.kernel.org/r/20240531212244.1593535-3-minwoo.im@samsung.com


Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>