After introducing burst API there were some artefacts in the
API documentation from legacy single API.
Also the rte_distributor_poll_pkt() function return values
mismatched the implementation.
Fixes: c0de0eb82e40 ("distributor: switch over to new API")
Cc: stable@dpdk.org
Signed-off-by: Lukasz Wojciechowski <l.wojciechow@partner.samsung.com>
Acked-by: David Hunt <david.hunt@intel.com>