stm32/boards/NUCLEO_H743ZI: Enable SPI3 on this board.

ports/stm32/boards/NUCLEO_H743ZI/mpconfigboard.h

@@ -43,10 +43,10 @@ void NUCLEO_H743ZI_board_early_init(void);
 #define MICROPY_HW_I2C2_SDA         (pin_F0)
 
 // SPI
-//#define MICROPY_HW_SPI2_NSS         (pin_I0)
-//#define MICROPY_HW_SPI2_SCK         (pin_I1)
-//#define MICROPY_HW_SPI2_MISO        (pin_B14)
-//#define MICROPY_HW_SPI2_MOSI        (pin_B15)
+#define MICROPY_HW_SPI3_NSS         (pin_A4)
+#define MICROPY_HW_SPI3_SCK         (pin_B3)
+#define MICROPY_HW_SPI3_MISO        (pin_B4)
+#define MICROPY_HW_SPI3_MOSI        (pin_B5)
 
 // USRSW is pulled low. Pressing the button makes the input go high.
 #define MICROPY_HW_USRSW_PIN        (pin_C13)

ports/stm32/boards/NUCLEO_H743ZI/pins.csv

@@ -20,6 +20,8 @@ D12,PB14
 D13,PI1
 D14,PB9
 D15,PB8
+D22,PB5
+D23,PB3
 DAC1,PA4
 DAC2,PA5
 LED1,PB0