Print ZAC device type in "camcontrol identify" output

ZAC (Zoned-device ATA Command set) is the standard for addressing SMR
(shingled magnetic recording) devices over SATA. Drives indicate their
support for ZAC in their IDENTIFY block. Print whether and how a drive
supports ZAC in the output of "camcontrol identify".

Reviewed by: ken, imp
MFC after: 3 weeks
Sponsored by: Spectra Logic Corp
Differential Revision: https://reviews.freebsd.org/D13171