Update Waveshare e-Ink display support

[x86ed]

What kind of new feature are you looking for? (Keep the one that applies, please describe)

• Hardware: Support for Waveshare https://www.waveshare.com/wiki/2.13inch_e-Paper_HAT_Manual v3 and v4 boards

Do you plan to:

• Contribute an initial driver: [Yes]
• Write unit tests: [Yes]
• Update https://github.com/periph/cmd to use the new functionality: [Yes]