Controller: add CNTLID, AVSCC, APSTA, NVSCC, ACWU, SGLS fields.

Namespace: add NMIC, RESCAP, EUI64 fields. EUI64 is specifically
interesting, since it can be used to construct an UEFI NVMe device
path for a boot entry.

As per NVM Express 1.1a spec:
http://www.nvmexpress.org/wp-content/uploads/NVM-Express-1_1a.pdfSigned-off-by: NDimitri John Ledkov <dimitri.ledkov@canonical.com>
Signed-off-by: NMatthew Wilcox <matthew.r.wilcox@intel.com>