[PATCHv2] nvme-tcp: align I/O cpu with blk-mq mapping

[Christoph Hellwig]

>  	if (wq_unbound)
>  		queue->io_cpu = WORK_CPU_UNBOUND;

None of the above computed information is even used for the wq_unbound
code.  This would make a lot more sense if the above assignment was in
the (only) caller.

Yes, that probably should have been done when merging the wq_unbound
option (which honestly looks so whacky that I wish it wasn't merged).