Make DolphinWX/ mostly IWYU clean.

Source/Core/DolphinWX/Debugger/DSPRegisterView.h

@@ -4,8 +4,15 @@
 
 #pragma once
 
+#include <cstring>
+#include <wx/defs.h>
 #include <wx/grid.h>
+#include <wx/string.h>
+#include <wx/windowid.h>
 
+#include "Common/CommonTypes.h"
+
+class wxWindow;
 
 class CDSPRegTable : public wxGridTableBase
 {