* Add central location for chibios defines
* Add central location for chibios defines - actually add files this time....
* Add Copyright header
* Update include order to resolve i2cv1 build errors
* Initial migration of software PWM backlight
* First pass at backlight driver docs
* Correct driver name in docs
* Run backlight_task when using BACKLIGHT_PINS
* Resolve backlight docs TODOs
* Move tmk_core/common/backlight to quantum/backlight
* Add guards to backlight inclusion
* Add guards to backlight inclusion
* Update backlight guards on clueboard/60
* Use full paths to avoid vpath issues