Display NVMe data properly on Big Endian hosts with sysutils/smartmontools

smartctl can now be used with NVMe drives on BE hosts.

Submitted by: Michal Stanek <mst@semihalf.com>
Reviewed by: cy
Obtained from: Semihalf
Sponsored by: IBM, QCM Technologies
Differential Revision: https://reviews.freebsd.org/D14543