* Rename EFI_INTERNAL_FLASH to EFI_STORAGE_INT_FLASH
This define enables use of RE custom flash driver for storing
settings to internal flash.
* at_start_f435: enable MFS for settings storing in internal flash
* MRE: fix special build
* kinetis: fix flash_int.cpp vs flash_int.c mess
* at32: allow allowFlashWhileRunning()
* flash_main: supress warning
* add STATIC_BOARD_ID defines to get Board-ID more universal
* add getBoardId()
* broadcast BENCH_TEST_BOARD_STATUS via CAN
* add guards for sendBoardStatus()