s/btf_get_from_id/btf__get_from_id/ to restore the API naming convention.
Signed-off-by: NMartin KaFai Lau <kafai@fb.com>
Signed-off-by: NAndrey Ignatov <rdna@fb.com>
Signed-off-by: NAlexei Starovoitov <ast@kernel.org>