xgl:  Remove XGL_* typedef wrappers

Part of moving to xgl.h rev#38, svn rev 29293-29302
diff --git a/layers/draw_state.h b/layers/draw_state.h
index dd6ca72..90cc1fe 100644
--- a/layers/draw_state.h
+++ b/layers/draw_state.h
@@ -60,8 +60,8 @@
 } DRAW_TYPE;
 
 //prototypes for extension functions
-XGL_VOID drawStateDumpDotFile(char* outFileName);
-XGL_VOID drawStateDumpPngFile(char* outFileName);
+void drawStateDumpDotFile(char* outFileName);
+void drawStateDumpPngFile(char* outFileName);
 // Func ptr typedefs
-typedef XGL_VOID (*DRAW_STATE_DUMP_DOT_FILE)(char*);
-typedef XGL_VOID (*DRAW_STATE_DUMP_PNG_FILE)(char*);
+typedef void (*DRAW_STATE_DUMP_DOT_FILE)(char*);
+typedef void (*DRAW_STATE_DUMP_PNG_FILE)(char*);