nvme-fc: Set new cmd set indicator in nvme-fc cmnd iu

Set the new category field in the FC-NVME CMND_IU based on queue number.

Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>