static int
dpll_xa_ref_pin_add(struct xarray *xa_pins, struct dpll_pin *pin,
		    const struct dpll_pin_ops *ops, void *priv)
static int
dpll_xa_ref_pin_add(struct xarray *xa_pins, struct dpll_pin *pin,
		    const struct dpll_pin_ops *ops, void *priv,
		    void *cookie)