xgl:  Remove XGL_* typedef wrappers

Part of moving to xgl.h rev#38, svn rev 29293-29302
diff --git a/loader/loader.h b/loader/loader.h
index ac8cfc1..18c05b7 100644
--- a/loader/loader.h
+++ b/loader/loader.h
@@ -40,6 +40,6 @@
 #  define LOADER_EXPORT
 #endif
 
-extern XGL_UINT loader_activate_layers(XGL_PHYSICAL_GPU gpu, const XGL_DEVICE_CREATE_INFO* pCreateInfo);
+extern uint32_t loader_activate_layers(XGL_PHYSICAL_GPU gpu, const XGL_DEVICE_CREATE_INFO* pCreateInfo);
 #define MAX_LAYER_LIBRARIES 64
 #endif /* LOADER_H */