This driver attached to the Intel VMD drive and connect a new PCI domain starting
at the max, and then working donwn. Then existing FreeBSD drivers will attach.
Interrupt routing from the VMD MSI-X to the NVME disk is not well known, so any
interrupt is sent to all children that register.
VROC used Intel meta data so GRAID works with it. However, GRAID supports RAID
0,1,10 for read and write. I have some early code to support writes with RAID 5.
Note that RAID 5 can have life issues with SSD since it can cause write
amplification updating the party etc.