stm32/boards/PYBD_SF2: Enable RF switch compile option.
#define MICROPY_HW_ENABLE_USB (1)
#define MICROPY_HW_ENABLE_SDCARD (1)
#define MICROPY_HW_ENABLE_MMCARD (1)
+#define MICROPY_HW_ENABLE_RF_SWITCH (1)
#define MICROPY_BOARD_EARLY_INIT board_early_init
#define MICROPY_BOARD_ENTER_STOP board_sleep(1);
