Exported symbols for port in, port out and table stats.
Fixes: 6504bb5ec460 ("pipeline: add statistics for ports and tables")
Signed-off-by: Maciej Gajdzica <maciejx.t.gajdzica@intel.com>
Acked-by: Michal Jastrzebski <michalx.k.jastrzebski@intel.com>
Acked-by: Cristian Dumitrescu <cristian.dumitrescu@intel.com>