libteam: call ifinfo handlers in case port is newly created

Signed-off-by: Jiri Pirko <jiri@resnulli.us>
libteam: get link object explicitly if event happens on it

Currently link object provided by caller was used to get info about
link. However, this object might be out-of-data providing us non actual
data. So get the object again to gain fresh info.

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