[coreboot] How do I install a patch for the w520 to use Displayport/VGA output?

I've installed Coreboot to a number of my Thinkpad machines, but I have no experience installing patches post installation.  I'm trying to get the Displayport/VGA output to function on my now corebooted w520.

https://www.coreboot.org/Board:lenovo/w520#VGA_.2F_DisplayPort_output <https://www.coreboot.org/Board:lenovo/w520#VGA_.2F_DisplayPort_output>

The official coreboot guide says there's a patch to install to get these to work.

Is it possible to put it in layman's terms so that I can get these working, I really really want to use my projector, so this would be so much help! I installed coreboot on my w520 myself so if it's similar to that process I believe I can get it done.

Thanks Coreboot team.