list_devices: adds support for several com ports

After the firmware change in the official PPK2 application 4.2.0, the
device now enumerates two serial ports: one for data and commands, the
other for a debug shell which is not used in this library. This forces
connection with the port on endpoint 1.

Author: wlgrd

src/ppk2_api/ppk2_api.py

@@ -219,13 +219,13 @@ def list_devices():
             devices = [
                 (port.device, port.serial_number[:8])
                 for port in ports
-                if port.description.startswith("nRF Connect USB CDC ACM")
+                if port.description.startswith("nRF Connect USB CDC ACM") and port.location.endswith("1")
             ]
         else:
             devices = [
                 (port.device, port.serial_number[:8])
                 for port in ports
-                if port.product == "PPK2"
+                if port.product == "PPK2" and port.location.endswith("1")
             ]
         return devices