sunxi_ccu_clock_find
clk = sunxi_ccu_clock_find(sc, name);
clk_parent = sunxi_ccu_clock_find(sc, parent);
struct sunxi_ccu_clk *sunxi_ccu_clock_find(struct sunxi_ccu_softc *,
clk_parent = sunxi_ccu_clock_find(sc, pname);