iris: utrace/perfetto support

v2: Fixup gpu_id computation, use minor of /dev/dri/* % 128 since we
    don't know whether we get card0 or renderD128 for instance.
    (Lionel)

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Rohan Garg <rohan.garg@intel.com> (v1)
Acked-by: Antonio Caggiano <antonio.caggiano@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13996>

src/gallium/drivers/iris/iris_screen.c

@@ -882,6 +882,8 @@ iris_screen_create(int fd, const struct pipe_screen_config *config)
 
    glsl_type_singleton_init_or_ref();
 
+   intel_driver_ds_init();
+
    /* FINISHME: Big core vs little core (for CPUs that have both kinds of
     * cores) and, possibly, thread vs core should be considered here too.
     */