stm32/boards/NUCLEO_F446RE: Enable DAC.
#define MICROPY_HW_HAS_SWITCH (1)
#define MICROPY_HW_HAS_FLASH (1)
#define MICROPY_HW_ENABLE_RTC (1)
+#define MICROPY_HW_ENABLE_DAC (1)
// HSE is 8MHz, CPU freq set to 168MHz. Using PLLQ for USB this gives a nice
// 48 MHz clock for USB. To goto 180 MHz, I think that USB would need to be
