docs: update softpipe status for shader_image_load_store.

Reviewed-by: Brian Paul <brianp@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/docs/GL3.txt b/docs/GL3.txt
index 03ebf70..804a96c 100644
--- a/docs/GL3.txt
+++ b/docs/GL3.txt
@@ -154,7 +154,7 @@
   GL_ARB_texture_storage                                DONE (all drivers)
   GL_ARB_transform_feedback_instanced                   DONE (i965, nv50, nvc0, r600, radeonsi, llvmpipe, softpipe)
   GL_ARB_base_instance                                  DONE (i965, nv50, nvc0, r600, radeonsi, llvmpipe, softpipe)
-  GL_ARB_shader_image_load_store                        DONE (i965, radeonsi)
+  GL_ARB_shader_image_load_store                        DONE (i965, radeonsi, softpipe)
   GL_ARB_conservative_depth                             DONE (all drivers that support GLSL 1.30)
   GL_ARB_shading_language_420pack                       DONE (all drivers that support GLSL 1.30)
   GL_ARB_shading_language_packing                       DONE (all drivers)