Raspberry Pi over USB C ethernet sharing

Find two files `config.txt` and `cmdline.txt` in the boot SD card.

In `cmdline.txt` add `modules-load=dwc2,g_ether` just before `rootwait` - make sure there's a space before `rootwait`.

In `config.txt` add `dtoverlay=dwc2,dr_mode=peripheral` as the last line.