migrate enc module to stm32f4
Merge branch 'master' into stm32f4_enc
correct platform naming
Include remaining platform modules when some fail guards
add doc for enc module and enable for other board configs
Merge branch 'stm32f4_enc'
- includes docs for enc module for stm32 and stm32f4
- migrates platform specific enc module from stm32 to stm32f4
- enables enc module on stm32f4 boards
- adds adjustment to modules build system to still include platform specific modules if some have
  guards and others do not when a guard fails