get_hardware_id()
* Allow for `get_hardware_id()` to be used for serial number. * Length checks. * Explain length. * Cleanup. * Preprocessor magic. * Use the force, Batman. * Swap logic; if SERIAL_NUMBER is defined use that, otherwise derive it. * Cleanup. * Cleanup.
* Remove CORTEX_ENABLE_WFI_IDLE from the codebase. * Turn on CORTEX_ENABLE_WFI_IDLE by default.