SPI flash swaping on Au V2

I looked into Vivado’s doc back then and there was no official ways to add new ID codes.

We use either Alchitry Loader, Alchitry Labs, or openFPGA to program the board using the .bin file generated by Vivado.

It may be possible to patch the Vivado’s programmer executable to accept new ID codes, but it’s more a hack than an official support…