Merge branch 'mptcp-fix-ipv6-reqsk-ops-and-some-netlink-error-codes'

Merge branch 'mptcp-fix-ipv6-reqsk-ops-and-some-netlink-error-codes'

Mat Martineau says:

====================
mptcp: Fix IPv6 reqsk ops and some netlink error codes

Patch 1 adds some missing error status values for MPTCP path management
netlink commands with invalid attributes.

Patches 2-4 make IPv6 subflows use the correct request_sock_ops
structure and IPv6-specific destructor. The first patch in this group is
a prerequisite change that simplifies the last two patches.
====================

Link: https://lore.kernel.org/r/20221210002810.289674-1-mathew.j.martineau@linux.intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>