[Core] Enable emulated eeprom when using F401xE.

[daskygit]

Not really much to change, I added the defined checks for STM32F401xE so it should work correctly if using the NUCLEO F401RE as a base.

I tested using the existing blackpill f401 platform by undefining STM32F401xC, defining STM32F401xE in my board.h and setting MCU_LDSCRIPT = STM32F401xE in my rules.mk.

ldflags.txt in .build shows the correct ldscript being used --script=./platforms/chibios/boards/common/ld/STM32F401xE.ld

Description

Types of Changes

• Core
• Bugfix
• New feature
• Enhancement/optimization
• Keyboard (addition or update)
• Keymap/layout/userspace (addition or update)
• Documentation

Checklist

• My code follows the code style of this project: C, Python
• I have read the PR Checklist document and have made the appropriate changes.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• I have tested the changes and verified that they work and don't break anything (as well as I can manage).