Add a systemd unit file, and respect the sysvinit feature when installing the
init script.
(thanks to Jukka Rissanen for the unit file)
(From OE-Core rev: e86538db13605953465aacc3f2fb7d719dad919e)
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>