This is required for EGL_EXT_present_opaque to work correctly.
Fixes: 8ade5588e3 ("zink: add kopper api")
Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/11007
Reviewed-by: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/30133>