Add support for displaying NVME device paths.

This doesn't actually let you /use/ them yet, but it does show them if
they're there.

Signed-off-by: Peter Jones <pjones@redhat.com>
Make nvme work with "-e 3".

This will force a long-form NVME device path.

Signed-off-by: Peter Jones <pjones@redhat.com>