[SeaBIOS] NVMe 1.0 compatibility and fixes

[Kevin O'Connor]

On Thu, Feb 23, 2017 at 11:27:52PM -0700, Daniel Verkamp wrote:
> With the first two patches applied, I am able to install and boot
> FreeDOS on an Intel SSD DC P3700, an NVMe 1.0 device, in QEMU
> using PCI device assignment.
> 
> The rest of the patches are minor issues found through inspection.

Thanks.  I committed this series.

If this was tested with QEMU device passthrough, do you think we can
also enable NVMe on real hardware?

-Kevin