smoke1 on mac with serial drivers installed

Looks like need to fix the smoke1 test on mac with the serial driver installed and the new detect_duplicate_port 

```
FAILED meshtastic/tests/test_smoke1.py::test_smoke1_test_with_arg_but_no_hardware - assert None
FAILED meshtastic/tests/test_smoke1.py::test_smoke1_port - assert 2 == 1
```