stm32/boards/STM32F429DISC: Enable UART as secondary REPL.
The board(s) feature a VCOM through the ST-LINK, this feature is something
to keep around.
#define MICROPY_HW_CLK_PLLP (RCC_PLLP_DIV2)
#define MICROPY_HW_CLK_PLLQ (7)
+#define MICROPY_HW_UART_REPL PYB_UART_1
+#define MICROPY_HW_UART_REPL_BAUD 115200
+
// UART config
#define MICROPY_HW_UART1_TX (pin_A9)
#define MICROPY_HW_UART1_RX (pin_A10)
