[PATCH] nvme: change cq_vector to a bool and set to true after request_irq

[Christoph Hellwig]

nvmeq_irq went away in a commit in the PCI tree, so merging this now
would create a bit of a merge problem.  Either we can live with the
conflict or delay the patch until the first round of merges for -rc1
are done..

> +	bool cq_vector;

I think the field is badly misnamed now.  Something like a flags
field with an NVME_PCI_Q_IS_ALIVE flag might be more suitable now?