Some distros may prefer to use the upstream systemd support for
starting getty on serial ports. This is now possible by adding
"serial-getty-generator" to PACKAGECONFIG.
The default is unchanged, i.e. systemd's own serial-getty@.service
file does not get packaged and instead systemd-serialgetty is pulled
into images via RRECOMMENDS.
Signed-off-by: Patrick Ohly <patrick.ohly@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
