stm32/mpu: Include MPU functions when ETH is enabled.
#ifndef MICROPY_INCLUDED_STM32_MPU_H
#define MICROPY_INCLUDED_STM32_MPU_H
-#if defined(STM32F7) || defined(STM32H7)
+#if defined(STM32F7) || defined(STM32H7) || defined(MICROPY_HW_ETH_MDC)
#define MPU_REGION_ETH (MPU_REGION_NUMBER0)
#define MPU_REGION_QSPI1 (MPU_REGION_NUMBER1)
