[Feature]: Xone 2D support (product id 0xff01)

[joe-dush]

The Pitch

Thanks a lot for this driver, I've been able to get my Xone:2D working with Mixxx on Linux Mint

I just needed to add it to the chip.c file

// Allen&Heath Xone:2D
{
.match_flags = USB_DEVICE_ID_MATCH_DEVICE
.idVendor = 0x0a4a,
.idProduct = 0xff01
},