i2c_mux_unregister
if (i2c_mux_unregister(ltc->ltc_mux) != I2C_MUX_REG_E_OK) {
if (i2c_mux_unregister(pca->pca_mux) != I2C_MUX_REG_E_OK) {
extern i2c_mux_reg_error_t i2c_mux_unregister(i2c_mux_hdl_t *);