This is a Squash-to patch for commit "bpf: Add bpf_mptcp_sched_ops",
similar to what has been done upstream for BPF TCP CA, see the commit
below.

Fixes: b7e852a9ec96 ("bpf: Remove unused arguments from btf_struct_access().")
Signed-off-by: Matthieu Baerts <[email protected]>
Message-Id: <[email protected]>