Merge branch 'sctp-add-some-missing-events-from-rfc5061'

Xin Long says:
====================
There are 4 events defined in rfc5061 missed in linux sctp:
SCTP_ADDR_ADDED, SCTP_ADDR_REMOVED, SCTP_ADDR_MADE_PRIM and
SCTP_SEND_FAILED_EVENT.

This patchset is to add them up.
====================

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>