sxiccmu_a64_get_frequency
return sxiccmu_a64_get_frequency(sc, A64_CLK_PLL_PERIPH0) * 2;
sc->sc_get_frequency = sxiccmu_a64_get_frequency;
uint32_t sxiccmu_a64_get_frequency(struct sxiccmu_softc *, uint32_t);