zink: feature-cap cleanup
This MR adds missing feature-cap checks, and does some other minor cleanups to the cap-code.
One nice benefit here is that we end up enabling OpenGL ES 3.0 on top of ANV.
This MR adds missing feature-cap checks, and does some other minor cleanups to the cap-code.
One nice benefit here is that we end up enabling OpenGL ES 3.0 on top of ANV.