crypto: include crypto- module prefix in template

This adds the module loading prefix "crypto-" to the template lookup
as well.

For example, attempting to load 'vfat(blowfish)' via AF_ALG now correctly
includes the "crypto-" prefix at every level, correctly rejecting "vfat":

	net-pf-38
	algif-hash
	crypto-vfat(blowfish)
	crypto-vfat(blowfish)-all
	crypto-vfat

Reported-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
static int crypto_rfc4543_decrypt(struct aead_request *req)
{
	int err;

	if (req->src != req->dst) {
		err = crypto_rfc4543_copy_src_to_dst(req, false);
		if (err)
			return err;
	}

	req = crypto_rfc4543_crypt(req, false);

	return crypto_aead_decrypt(req);
}

static int crypto_rfc4543_decrypt(struct aead_request *req)
{
	int err;

	if (req->src != req->dst) {
		err = crypto_rfc4543_copy_src_to_dst(req, false);
		if (err)
			return err;
	}

	req = crypto_rfc4543_crypt(req, false);

	return crypto_aead_decrypt(req);
}
