crypto: add __init/__exit annotations to init/exit funcs

Add missing __init/__exit annotations to init/exit funcs.

Signed-off-by: Xiu Jianfeng <xiujianfeng@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/crypto/curve25519-generic.c b/crypto/curve25519-generic.c
index bd88fd5..d055b07 100644
--- a/crypto/curve25519-generic.c
+++ b/crypto/curve25519-generic.c
@@ -72,12 +72,12 @@ static struct kpp_alg curve25519_alg = {
 	.max_size		= curve25519_max_size,
 };
 
-static int curve25519_init(void)
+static int __init curve25519_init(void)
 {
 	return crypto_register_kpp(&curve25519_alg);
 }
 
-static void curve25519_exit(void)
+static void __exit curve25519_exit(void)
 {
 	crypto_unregister_kpp(&curve25519_alg);
 }