This change allows adding additional files to the xfrm_interface module.
Signed-off-by: NEyal Birger <eyal.birger@gmail.com>
Link: https://lore.kernel.org/r/20221203084659.1837829-2-eyal.birger@gmail.comSigned-off-by: NMartin KaFai Lau <martin.lau@kernel.org>