Instead of setting 'Restart=always' in the service file, we should
make the service socket activated, just like what Fedora does.
(From OE-Core rev: 176e91ef28800adb6295b29c455b2efb91a01876)
Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>