tpm2serial: load the RGB data in RGB order, not BGR order.

Probably due to the differences in compilers/host systems/something, the code:
```arduino
leds[i+ledOffset] = CRGB(frameData[ofs++], frameData[ofs++], frameData[ofs++]);
```
can result in the frameData being retrieved in BGR order instead of RGB. It is not explict as to which `ofs++` runs first. This change makes the value retreival order explict. Maybe it works on teensy devices? It doesn't work as designed on the Arduino Uno.

I set `panel.color.order=BGR` during testing to make it work, but that's no actual solution.

*This is a separate pull request, because I wasn't sure it was the problem until after the last pull request was submitted and it may require further discussions.*