K 10
svn:author
V 3
imp
K 8
svn:date
V 27
2018-12-02T23:12:58.980286Z
K 7
svn:log
V 337
Usage cleanup pt 1

Provide a usage() function that takes a struct nvme_function pointer
and produces a usage mssage. Eliminate all now-redundant usage
functions. Propigate the new argument through the program as needed.
Use common routine to print usage.

Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D18403

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