vrend: On GLES don't advertise atomic counters for any shader stage

We always want to lower the atomic counters to SSBO on GLES.

Fixes: 447c8c2bfd90ef654f440353745016b68bbcfc33
  renderer: Do not expose atomic counter availability for fragment shader

Signed-off-by: Gert Wollny <gert.wollny@collabora.com>
Part-of: <https://gitlab.freedesktop.org/virgl/virglrenderer/-/merge_requests/873>
3 files changed