Function spi_slave_disable 

pub unsafe extern "C" fn spi_slave_disable(
    host: spi_host_device_t,
) -> esp_err_t

@brief Disable the spi slave function for an initialized spi host

@param host SPI peripheral to be disabled @return - ESP_OK On success - ESP_ERR_INVALID_ARG Unsupported host - ESP_ERR_INVALID_STATE Peripheral already disabled