dwiic_i2c_release_bus
sc->sc_i2c_tag.ic_release_bus = dwiic_i2c_release_bus;
dwiic_i2c_release_bus(cookie, flags);
sc->sc_i2c_tag.ic_release_bus = dwiic_i2c_release_bus;
void dwiic_i2c_release_bus(void *, int);
sc->sc_i2c_tag.ic_release_bus = dwiic_i2c_release_bus;