Minor changes to the SYSTEMD_PACKAGES, SYSTEMD_SERVICE, and
SYSTEMD_AUTO_ENABLE variables.
(From yocto-docs rev: 838eb9088ec20a265e785d4203e4e5084fd4a7c4)
Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>