Function mraa_sys::mraa_add_subplatform

pub unsafe extern "C" fn mraa_add_subplatform(
    subplatformtype: mraa_platform_t, 
    dev: *const c_char
) -> mraa_result_t

Add mraa subplatform

@param subplatformtype subplatform type @param dev uart device or i2c bus subplatform is on

@return mraa_result_t indicating success