* Removed ProS2 and added TinyS2 to boards.txt

* Fixed incorrect NUM_OUTPUT_PINS - should be 47 not 45
This is why my APA doesn't work on my FeatherS2 as it usess IO45 and the check is for < not <=

* TinyS2 from boards.txt got stomped with old proS2 stuff (no idea why), so adding it back in.