Fix big/little endian confusion in commander pro temperature readout

[G33KatWork]

Proposed changes

The temperatures are reported in big endian by the device. The voltages are returned from the device in the same way where the endianness was flipped correctly, so I copied the code from there.

Types of changes

• [x] Bugfix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist

• [x] I have read the CONTRIBUTING doc
• [ ] Make sure you are requesting to pull a topic/feature/bugfix branch (right side). Don't request your master!
• [x] Make sure you are making a pull request against the testing branch (left side). Also you should start your branch off our testing.
• [x] Lint and unit tests pass locally with my changes
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] I have added necessary documentation (if appropriate)
• [ ] Any dependent changes have been merged and published in downstream modules
• [ ] Check the commit's or even all commits' message styles matches our requested structure.

[audiohacked]

Thanks for the Merge Request and the fix for temperature!