stm32/boards/NUCLEO_F429ZI: Enable I2C1 and I2C2 with default pins.

The datasheet on page 55 shows PF0 (SDA) and PF1 (SCL) are the pins for
I2C2, but these pins do not work.  Checking the MBED pinout for the
NUCLEO-F429ZI shows:

    I2C1: PB8 (SCL) and PB9 (SDA).
    I2C2: PB10 (SCL) and PB11 (SDA).

Both of these work and can be scanned and find devices connected to them.

Signed-off-by: Dale Weber <hybotics.sd@gmail.com>.

ports/stm32/boards/NUCLEO_F429ZI/mpconfigboard.h

@@ -40,6 +40,12 @@
 #define MICROPY_HW_UART_REPL_BAUD   115200
 
 // I2C buses
+#define MICROPY_HW_I2C1_SCL (pin_B8)  // Pin 2 on CN7
+#define MICROPY_HW_I2C1_SDA (pin_B9)  // Pin 4 on CN7
+
+#define MICROPY_HW_I2C2_SCL (pin_B10) // Pin 32 on CN10
+#define MICROPY_HW_I2C2_SDA (pin_B11) // Pin 34 on CN10
+
 #define MICROPY_HW_I2C3_SCL (pin_A8)
 #define MICROPY_HW_I2C3_SDA (pin_C9)