imx_ccm_clock_find
clk_parent = imx_ccm_clock_find(sc, parent);
clk = imx_ccm_clock_find(sc, name);
struct imx_ccm_clk *imx_ccm_clock_find(struct imx_ccm_softc *,
rclk_parent = imx_ccm_clock_find(sc, composite->parents[mux]);