RUI ADC Uninitialize

RUI_RETURN_STATUS rui_adc_uninit(RUI_GPIO_ST *rui_gpio);

@brief	This API is used to uninitialize ADC
@return	RUI_RETURN_STATUS
@param	RUI_GPIO_ST *rui_gpio: the instance of GPIO.
@support	RAK811, RAK4200, RAK4400, RAK4600, RAK5010 and RAK8212-M.