Move NVMe files to global files list

[jhibbits]

Summary

There's nothing in NVMe that's inherently architecture-specific, and
NVMe should be usable by non-x86 architectures.

[imp]

I'm pretty sure it won't work with big endian machine. Have you tested this?

[imp]

Added Jim Harris who wrote the driver.

[jhibbits]

In D7295#151926, @imp wrote:

I'm pretty sure it won't work with big endian machine. Have you tested this?

Nope, haven't tested it, don't have a NVME card to test with. There have between people expressing a desire to use it on PowerPC. Regardless, it should be usable on any little endian platform, and any bugs for big endian can be squashed as they are tested.

[jimharris]

In D7295#151938, @jhibbits wrote:

In D7295#151926, @imp wrote:

I'm pretty sure it won't work with big endian machine. Have you tested this?

Nope, haven't tested it, don't have a NVME card to test with. There have between people expressing a desire to use it on PowerPC. Regardless, it should be usable on any little endian platform, and any bugs for big endian can be squashed as they are tested.

bus_dmamap_sync() operations are also needed for accessing submission/completion queues and PRPs.

[jhibbits]

Taken care of elsewhere