Revert "crypto: testmgr - Disable rfc4543 test"

This reverts commit 9b9f9296a7b73fbafe0a0a6f2494eaadd97f9f73 as
all in-kernel implementations of GCM have been converted to the
new AEAD interface, meaning that they should now pass the updated
rfc4543 test.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/testmgr.c

@@ -3372,7 +3372,7 @@ static const struct alg_test_desc alg_test_descs[] = {
 			}
 		}
 	}, {
-		.alg = "rfc4543(gcm(aes))-disabled",
+		.alg = "rfc4543(gcm(aes))",
 		.test = alg_test_aead,
 		.suite = {
 			.aead = {