crypto: prefix module autoloading with "crypto-"

This prefixes all crypto module loading with "crypto-" so we never run
the risk of exposing module auto-loading to userspace via a crypto API,
as demonstrated by Mathias Krause:

https://lkml.org/lkml/2013/3/4/70

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
 static int __init crypto_null_mod_init(void)
 {
	int ret = 0;

	ret = crypto_register_algs(null_algs, ARRAY_SIZE(null_algs));
	if (ret < 0)
		goto out;

	ret = crypto_register_shash(&digest_null);
	if (ret < 0)
		goto out_unregister_algs;

	return 0;

out_unregister_algs:
	crypto_unregister_algs(null_algs, ARRAY_SIZE(null_algs));
out:
	return ret;
}

 static int __init crypto_null_mod_init(void)
 {
	int ret = 0;

	ret = crypto_register_algs(null_algs, ARRAY_SIZE(null_algs));
	if (ret < 0)
		goto out;

	ret = crypto_register_shash(&digest_null);
	if (ret < 0)
		goto out_unregister_algs;

	return 0;

out_unregister_algs:
	crypto_unregister_algs(null_algs, ARRAY_SIZE(null_algs));
out:
	return ret;
}
