r600 : disable draw_prim for now.

src/mesa/drivers/dri/r600/r700_render.c

@@ -1145,8 +1145,11 @@ static void r700DrawPrims(GLcontext *ctx,
 void r700InitDraw(GLcontext *ctx)
 {
 	struct vbo_context *vbo = vbo_context(ctx);
-
+	
+	/* to be enabled */
+	/*
 	vbo->draw_prims = r700DrawPrims;
+	*/
 }