fastboot: Streamline response processing

            text: "",

            dataSize: null,

        };

        let response;

        let respStatus;

        do {

            let respPacket = await this.device.transferIn(0x01, 64);

            response = new TextDecoder().decode(respPacket.data);

            common.logDebug("response: packet", respPacket, "string", response);

            let response = new TextDecoder().decode(respPacket.data);

            if (response.startsWith("OKAY")) {

            respStatus = response.substring(0, 4);

            let respMessage = response.substring(4);

            common.logDebug(`Response: ${respStatus} ${respMessage}`);

            if (respStatus === "OKAY") {

                // OKAY = end of response for this command

                returnData.text += response.substring(4);

            } else if (response.startsWith("INFO")) {

                returnData.text += respMessage;

            } else if (respStatus === "INFO") {

                // INFO = additional info line

                returnData.text += response.substring(4) + "\n";

            } else if (response.startsWith("DATA")) {

                returnData.text += respMessage + "\n";

            } else if (respStatus === "DATA") {

                // DATA = hex string, but it's returned separately for safety

                returnData.dataSize = response.substring(4);

                returnData.dataSize = respMessage;

            } else {

                // Assume FAIL or garbage data

                throw new FastbootError(

                    response.substring(0, 4),

                    response.substring(4)

                );

                throw new FastbootError(respStatus, respMessage);

            }

            // INFO means that more packets are coming

        } while (response.startsWith("INFO"));

        } while (respStatus === "INFO");

        return returnData;

    }