Fix propagated FET port typos (no output change).
Add support for TBS 30A ESCs (ICP input version).
Add a few more boards.
Work around avrdude <= 5.11.1 verification bugs.

Since 50ac1b7a, we try to work around verification bugs exposed when the
program area shrinks by actually implementing flash clearing on when chip
erase is requested. However, since we can't clear the boot loader, this
ends up moving the problem to there. To solve all cases except where chip
erase is skipped (-D), pad the boot loader so that there are no gaps.
Remove -D from program_tgy_% target to work around avrdude verification bugs.
Correct voltage sense resistance.
Reduce voltage sense fraction to lowest terms.
Reduce manual 8-bit immediate manipulation into macros. No output change.