xgl:  Remove XGL_* typedef wrappers

Part of moving to xgl.h rev#38, svn rev 29293-29302
diff --git a/icd/intel/buf.c b/icd/intel/buf.c
index ead29ba..69374b4 100644
--- a/icd/intel/buf.c
+++ b/icd/intel/buf.c
@@ -37,7 +37,7 @@
 }
 
 static XGL_RESULT buf_get_info(struct intel_base *base, int type,
-                               XGL_SIZE *size, XGL_VOID *data)
+                               size_t *size, void *data)
 {
     struct intel_buf *buf = intel_buf_from_base(base);
     XGL_RESULT ret = XGL_SUCCESS;