st/mesa: respect higher GLSL levels. (v2)

Limit the max glsl version level to what the state tracker supports.
Reviewed-by: Brian Paul <brianp@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

src/mesa/state_tracker/st_extensions.c

@@ -594,13 +594,9 @@ void st_init_extensions(struct st_context *st)
    /* Figure out GLSL support. */
    glsl_feature_level = screen->get_param(screen, PIPE_CAP_GLSL_FEATURE_LEVEL);
 
-   if (glsl_feature_level >= 140) {
-      ctx->Const.GLSLVersion = 140;
-   } else if (glsl_feature_level >= 130) {
-      ctx->Const.GLSLVersion = 130;
-   } else {
-      ctx->Const.GLSLVersion = 120;
-   }
+   ctx->Const.GLSLVersion = glsl_feature_level;
+   if (glsl_feature_level >= 330)
+      ctx->Const.GLSLVersion = 330;
 
    _mesa_override_glsl_version(st->ctx);