move to single OSD font on some boards
this saves about 12k on these boards. They were also extremely close
to overflowing flash, under 2k on some
Now that we support having an OSD font on the microSD card (where
available) we can reduce built in fonts without a large functionality
impact
This also disables some less used features on these boards:
- generator support
- object avoidance path planning
- precision landing
This will give us some breathing room on these boards
