Add PoroCYon's DSP code. (#1123)

* Add PoroCYon's DSP code.

* Remove some teakra iles that we dont need.

* make some requested changes.

* move DataMemoryOffset into namespace.

* use deault param.

* ad the switch change

* <Generic> forget about the default parameter

src/NDS.h

@@ -50,6 +50,7 @@ enum
     Event_DSi_CamTransfer,
 
     Event_DSi_RAMSizeChange,
+    Event_DSi_DSP,
 
     Event_MAX
 };