mk: format some option lists

Alphabetize and give each option its own line, ahead of making another
change to these lists. This makes future diffs easier to read.

Reviewed by: imp, emaste
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D31399

(cherry picked from commit bcd2f41f7d222a942fe0a268614b46d3ec3af4c0)