Error on detector due to new implementations

[yeyeto2788]

Using the detect.py and exception is raised due to new implementations (Onion Omega implementations)

Traceback (most recent call last):
 File "/home/xxx/own_workspace/Adafruit_Python_PlatformDetect/bin/detect.py", line 7, in <module>
   print("Chip id: ", detector.chip.id)
 File "/home/xxx/own_workspace/Adafruit_Python_PlatformDetect/adafruit_platformdetect/chip.py", line 66, in id
   return self._linux_id()
 File "/home/xxx/own_workspace/Adafruit_Python_PlatformDetect/adafruit_platformdetect/chip.py", line 111, in _linux_id
   if "MIPS 24Kc" in cpu_model:
TypeError: argument of type 'NoneType' is not iterable

I'll file a PR fixing the issue.

[yeyeto2788]

My bad, the issue was already fixed. Sorry for the mistake.