Pi 4 XHCI support
- Fix a bridge setup mistake that meant inbound memory transfers didn't work
- Add XHCIDriver to the keyboard scan group
Tested on a Pi 4 with 2GB and 8GB of RAM, with a keyboard & mouse & FAT memory stick copying data off to null:$.
Tested on a Pi 4 with 2GB and 8GB of RAM, with a keyboard & mouse & FAT memory stick copying data off to null:$.