crypto: kdf - skip self-test when tests disabled

Make kdf_sp800108 honor the CONFIG_CRYPTO_MANAGER_DISABLE_TESTS kconfig
option, so that it doesn't always waste time running its self-test.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/kdf_sp800108.c

@@ -125,9 +125,13 @@ static const struct kdf_testvec kdf_ctr_hmac_sha256_tv_template[] = {
 
 static int __init crypto_kdf108_init(void)
 {
-	int ret = kdf_test(&kdf_ctr_hmac_sha256_tv_template[0], "hmac(sha256)",
-			   crypto_kdf108_setkey, crypto_kdf108_ctr_generate);
+	int ret;
+
+	if (IS_ENABLED(CONFIG_CRYPTO_MANAGER_DISABLE_TESTS))
+		return 0;
 
+	ret = kdf_test(&kdf_ctr_hmac_sha256_tv_template[0], "hmac(sha256)",
+		       crypto_kdf108_setkey, crypto_kdf108_ctr_generate);
 	if (ret) {
 		if (fips_enabled)
 			panic("alg: self-tests for CTR-KDF (hmac(sha256)) failed (rc=%d)\n",