gallium/swr: Enable some ARB_gpu_shader5 extensions
Enable / add to features.txt:
- Enhanced textureGather.
- Geometry shader instancing.
- Geometry shader multiple streams.

Reviewed-by: Jan Zielinski <jan.zielinski@intel.com>
diff --git a/docs/features.txt b/docs/features.txt
index 23f03ab..f2890fe 100644
--- a/docs/features.txt
+++ b/docs/features.txt
@@ -121,9 +121,9 @@
   - Implicit signed -> unsigned conversions             DONE (softpipe)
   - Fused multiply-add                                  DONE (softpipe)
   - Packing/bitfield/conversion functions               DONE (freedreno, softpipe)
-  - Enhanced textureGather                              DONE (freedreno, softpipe)
-  - Geometry shader instancing                          DONE (llvmpipe, softpipe)
-  - Geometry shader multiple streams                    DONE (softpipe)
+  - Enhanced textureGather                              DONE (freedreno, softpipe, swr)
+  - Geometry shader instancing                          DONE (llvmpipe, softpipe, swr)
+  - Geometry shader multiple streams                    DONE (softpipe, swr)
   - Enhanced per-sample shading                         DONE ()
   - Interpolation functions                             DONE (softpipe)
   - New overload resolution rules                       DONE (softpipe)