Merge branch 'mptcp-a-few-fixes'

Mat Martineau says:

====================
mptcp: A few fixes

Patch 1 fixes a RCU locking issue when processing a netlink command that
updates endpoint flags in the in-kernel MPTCP path manager.

Patch 2 fixes a typo affecting available endpoint id tracking.

Patch 3 fixes IPv6 routing in the MPTCP self tests.
====================

Link: https://lore.kernel.org/r/20220121003529.54930-1-mathew.j.martineau@linux.intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>