intel/vec4: Use MESA_PRIM_* instead of GL_*

Reviewed-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24821>

src/intel/compiler/brw_vec4_gs_visitor.cpp

@@ -496,7 +496,7 @@ vec4_gs_visitor::gs_emit_vertex(int stream_id)
 
    /* In stream mode we have to set control data bits for all vertices
     * unless we have disabled control data bits completely (which we do
-    * do for GL_POINTS outputs that don't use streams).
+    * do for MESA_PRIM_POINTS outputs that don't use streams).
     */
    if (c->control_data_header_size_bits > 0 &&
        gs_prog_data->control_data_format ==