exiic_wait_state
if (exiic_wait_state(sc, I2C_STAT, I2C_STAT_BUSY_SIGNAL, 0)) {
if (!exiic_wait_state(sc, I2C_CON, I2C_CON_INTPENDING,
int exiic_wait_state(struct exiic_softc *, uint32_t, uint32_t, uint32_t);