zink: fix debug utils init

this was moved to a different struct without being updated

Fixes: fe669ff4a0 ("zink: replace old code with generated zink_instance")

Reviewed-by: Dave Airlie <airlied@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8220>

src/gallium/drivers/zink/zink_screen.c

@@ -1064,7 +1064,7 @@ zink_internal_create_screen(const struct pipe_screen_config *config)
    if (!load_instance_extensions(screen))
       goto fail;
 
-   if (screen->have_debug_utils_ext && !create_debug(screen))
+   if (screen->instance_info.have_EXT_debug_utils && !create_debug(screen))
       debug_printf("ZINK: failed to setup debug utils\n");
 
    screen->pdev = choose_pdev(screen->instance);

src/gallium/drivers/zink/zink_screen.h

@@ -74,8 +74,6 @@ struct zink_screen {
    uint32_t loader_version;
    bool have_physical_device_prop2_ext;
 
-   bool have_debug_utils_ext;
-
    bool needs_mesa_wsi;
 
 #if defined(MVK_VERSION)