teamd: state: allow to register vals for one port only

Signed-off-by: Jiri Pirko <jiri@resnulli.us>
teamd: lw: convert to new style state api

Signed-off-by: Jiri Pirko <jiri@resnulli.us>
teamd: state: remove old no longer used infrastructure

Signed-off-by: Jiri Pirko <jiri@resnulli.us>