This is a workaround for the inconsistent device naming pattern
implemented in the device driver for Silicon Labs CP2102 USB to UART
Bridge Controller. When there are multiple devices installed on one
computer, the second and subsequent devices are given a numeric suffix
that increments every time one of the devices is plugged in. Thus,
unplugging and reinserting a cable causes the device name to change.
The workaround is to use the device USB location identifier as an
alternative consistent handle for the device, assuming that the cable
is plugged into the same jack each time. This workaround does not
interfere with using the normal device name as the handle for cases
where only one device is used or when the inconsistent naming is not a
problem.
