Add missing __init/__exit annotations to module init/exit funcs.
Signed-off-by: NXiu Jianfeng <xiujianfeng@huawei.com>
Link: https://lore.kernel.org/r/20220909091840.247946-1-xiujianfeng@huawei.comSigned-off-by: NJakub Kicinski <kuba@kernel.org>