Fixed release notes for changes made in eventdev library.
Also updated the eventdev guide had got the type of the
rte_event_vector struct's u64s union field wrong.
Fixes: 5fa63911e43b ("eventdev: replace padding type in event vector")
Fixes: 0fbb55efa542 ("eventdev: add element offset to event vector")
Fixes: d986276f9b72 ("eventdev: add prefix to public symbol")
Signed-off-by: Pavan Nikhilesh <pbhagavatula@marvell.com>
Signed-off-by: Mattias Rönnblom <mattias.ronnblom@ericsson.com>
Acked-by: Jerin Jacob <jerinj@marvell.com>