sysutils/ansible-{kld,sysrc}: Update to latest commit and convert to slave ports

While here, appease both portfmt and portclippy.

Changes: https://github.com/dlundgren/ansible-freebsd-modules/compare/cf37fc1..537984b
Approved by: tcberner (mentor)
Differential Revision: https://reviews.freebsd.org/D29447