moved HLE::MRC to its own module, added support for catching data synchronization barrier command

src/core/hle/mrc.h

@@ -0,0 +1,20 @@
+// Copyright 2014 Citra Emulator Project
+// Licensed under GPLv2
+// Refer to the license.txt file included.  
+
+#pragma once
+
+#include "common/common_types.h"
+
+namespace HLE {
+
+/// MRC operations (ARM register from coprocessor), decoded as instr[20:27]
+enum ARM11_MRC_OPERATION {
+    DATA_SYNCHRONIZATION_BARRIER    = 0xE0,
+    CALL_GET_THREAD_COMMAND_BUFFER  = 0xE1,
+};
+
+/// Call an MRC operation in HLE
+u32 CallMRC(ARM11_MRC_OPERATION operation);
+
+} // namespace