* Add rules.mk defaults for f103,f072,f042
* Add rules.mk defaults for f103,f072,f042 - remove comment
* Add rules.mk defaults for f103,f072,f042 - align USE_FPU
* Reset MCU to avoid build issues
* Move essential config values to top and remove ability for override
* Align DFU_SUFFIX_ARGS order with DFU_ARGS