* hard pwm
* fix, comments
* PC6-9 and PD12-15
* PB6-9
* dynamic frequency
* f7 mcuconf
* format
* relocate to common, support variable frequency
* error handling
* oops
* fix test build
* noop kinetis
* better guards
* guard for bl
* guards don't work if they have typos
* more mapping
* oops
* don't use for slow pwm
* enable pwm
* guard properly
* save a little memory
* use less mem
* correct timers
* all your ram are belong to us
* update limit & comment
Co-authored-by: Matthew Kennedy <makenne@microsoft.com>