crypto: kdf - silence noisy self-test

Make the kdf_sp800108 self-test only print a message on success when
fips_enabled, so that it's consistent with testmgr.c and doesn't spam
the kernel log with a message that isn't really important.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/kdf_sp800108.c

@@ -140,7 +140,7 @@ static int __init crypto_kdf108_init(void)
 		WARN(1,
 		     "alg: self-tests for CTR-KDF (hmac(sha256)) failed (rc=%d)\n",
 		     ret);
-	} else {
+	} else if (fips_enabled) {
 		pr_info("alg: self-tests for CTR-KDF (hmac(sha256)) passed\n");
 	}