Now that we have  aproper non debug API to declare which function is
fmodret, we can rely on it.

Link: https://lore.kernel.org/all/20221121104403.1545f9b5@gandalf.local.home/Suggested-by: NAlexei Starovoitov <alexei.starovoitov@gmail.com>
Signed-off-by: NBenjamin Tissoires <benjamin.tissoires@redhat.com>
Link: https://lore.kernel.org/r/20221206145936.922196-3-benjamin.tissoires@redhat.com