MMIO: Port the SW CP/PE MMIOs to the new interface.

Migration is now complete.

Source/Core/VideoBackends/Software/SWPixelEngine.h

@@ -8,6 +8,7 @@
 #include "VideoCommon.h"
 
 class PointerWrap;
+namespace MMIO { class Mapping; }
 
 namespace SWPixelEngine
 {
@@ -200,6 +201,8 @@ namespace SWPixelEngine
 	void Init();
 	void DoState(PointerWrap &p);
 
+	void RegisterMMIO(MMIO::Mapping* mmio, u32 base);
+
 	// Read
 	void Read16(u16& _uReturnValue, const u32 _iAddress);