service: Add nfc services

3dbrew was used for the command information.

src/core/hle/service/nfc/nfc.h

@@ -0,0 +1,14 @@
+// Copyright 2016 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+namespace Service {
+namespace NFC {
+
+/// Initialize all NFC services.
+void Init();
+
+} // namespace NFC
+} // namespace Service