R600 + mesa/st: nir fix ssbo and atomics, and enable compute shaders
This series adds a cap to not lower atomics if the driver requests so. It adds fixes for atomics and ssbo to bring the nir back end mostly on par with the TGSI backend in that regards. There are still some piglit regressions with shared atomics and some image piglits flip.
Edited by Gert Wollny