serial: Add function to parse serial options.
hameg-serial: Add initial scan for HMO devices
usb: Add autofind for serial usb devices
hameg-serial: Refactor out the probing logic.
hameg-serial: Add USB auto discovery
serial: Fix return value of serial_read() fow Windows.
scpi: Add helper functions for scpi communication
scpi: Don't copy unnecessarily the string in scpi_get_string.
scpi: Add ability to retry reading and have a timeout between retries.
scpi: Add function documentation.
hameg: Use common SCPI functions for discovery.
hameg: Add get_device_type helper function.