R9 270 *non x* missing from list of cards which DON'T work after 10.15

[shardsofaperture]

From AMD GPU's List - R9 270 - (which is missing from the list) doesn't support full acceleration starting with 10.15. It works with GPU Spoof in 10.14 with full acceleration, but upgrading to 10.15 I have confirmed two cases of it not working in 10.15+. Display/video out is fine on HDMI, but the card doesn't present to the full system for use and acceleration. Lilu/Whatevergreen are loaded.

Symptoms which indicated acceleration issues include slow drawers popping up off the dock, and some application menus with layers/transparency acting sluggish or presenting incorrectly.

Also in system information, METAL doesn't show up, not 100% sure if that's related but I think it is.

[vitalyster]

Works for me on 12.0