Overall cleanup.

src/boards/asic_pt8154.h

@@ -26,6 +26,7 @@ void PT8154_syncCHR (int, int);
 void PT8154_syncMirror ();
 DECLFW (PT8154_writeExtra);
 DECLFW (PT8154_writeWRAM);
+void PT8154_clear ();
 void PT8154_activate (uint8, void (*)());
 void PT8154_addExState ();
 void PT8154_restore (int);