Merge branch 'mptcp-fixes'

Mat Martineau says:

====================
mptcp: Fixes for v5.13

Here are two MPTCP fixes from Paolo.

Patch 1 fixes some possible connect-time race conditions with
MPTCP-level connection state changes.

Patch 2 deletes a duplicate function declaration.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>