Passthrough Helper for PopOS 20.04

#This script is based on vfio-pci-override.sh found at http://vfio.blogspot.com/2015/05/

This is a simple script that makes your system ready to run a KVM/QEMU virtual machine with its own GPU.

2 GPUs with different IDs are needed. One of the GPUs can be an iGPU.

For a tutorial, visit: https://www.youtube.com/watch?v=HBEqGHCd8hk