hw/block/nvme: bump spec data structures to v1.3

hw/block/nvme: bump spec data structures to v1.3

Add missing fields in the Identify Controller and Identify Namespace
data structures to bring them in line with NVMe v1.3.

This also adds data structures and defines for SGL support which
requires a couple of trivial changes to the nvme block driver as well.

Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
Acked-by: Fam Zheng <fam@euphon.net>
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Reviewed-by: Dmitry Fomichev <dmitry.fomichev@wdc.com>
Message-Id: <20200706061303.246057-2-its@irrelevant.dk>