Handle bad values in XNCP chip info parsing

[puddly]

Some test firmwares with a broken implementation of this command are out in the wild, preventing ZHA startup. This works around the startup issue.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.51%. Comparing base (2ec05d0) to head (9e13bc4).
⚠️ Report is 1 commits behind head on dev.

Additional details and impacted files

@@           Coverage Diff           @@
##              dev     #688   +/-   ##
=======================================
  Coverage   99.51%   99.51%           
=======================================
  Files          58       58           
  Lines        3951     3958    +7     
=======================================
+ Hits         3932     3939    +7     
  Misses         19       19           

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