crypto: tcrypt - add OFB functional tests

We already have OFB test vectors and tcrypt OFB speed tests.
Add OFB functional tests to tcrypt as well.
Signed-off-by: NGilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

crypto/tcrypt.c

@@ -1735,6 +1735,7 @@ static int do_test(const char *alg, u32 type, u32 mask, int m, u32 num_mb)
 		ret += tcrypt_test("xts(aes)");
 		ret += tcrypt_test("ctr(aes)");
 		ret += tcrypt_test("rfc3686(ctr(aes))");
+		ret += tcrypt_test("ofb(aes)");
 		break;
 
 	case 11: