Stub the y2r:u service

src/core/hle/service/y2r_u.h

@@ -0,0 +1,23 @@
+// Copyright 2014 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "core/hle/service/service.h"
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+// Namespace Y2R_U
+
+namespace Y2R_U {
+
+class Interface : public Service::Interface {
+public:
+    Interface();
+
+    std::string GetPortName() const override {
+        return "y2r:u";
+    }
+};
+
+} // namespace