radeonsi: enable multi-draw related pipe caps

This enables GL_shader_draw_parameters and GL_ARB_indirect_parameters as well
as a properly accelerated implementation of GL_ARB_multi_draw_indirect.

Enabling the feature requires a sufficiently uptodate firmware -- those have
already been released a long time ago, although this does mean that the
feature only works with the amdgpu kernel module, since the radeon module
doesn't have a way to query the firmware version.

Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
diff --git a/docs/GL3.txt b/docs/GL3.txt
index c185c69..0ba5a25 100644
--- a/docs/GL3.txt
+++ b/docs/GL3.txt
@@ -283,7 +283,7 @@
   GL_ARB_ES3_2_compatibility                            not started
   GL_ARB_fragment_shader_interlock                      not started
   GL_ARB_gpu_shader_int64                               started (airlied for core and Gallium, idr for i965)
-  GL_ARB_indirect_parameters                            DONE (nvc0)
+  GL_ARB_indirect_parameters                            DONE (nvc0, radeonsi)
   GL_ARB_parallel_shader_compile                        not started, but Chia-I Wu did some related work in 2014
   GL_ARB_pipeline_statistics_query                      DONE (i965, nvc0, radeonsi, softpipe, swr)
   GL_ARB_post_depth_coverage                            not started
@@ -293,7 +293,7 @@
   GL_ARB_shader_atomic_counter_ops                      DONE (nvc0, radeonsi, softpipe)
   GL_ARB_shader_ballot                                  not started
   GL_ARB_shader_clock                                   DONE (i965/gen7+)
-  GL_ARB_shader_draw_parameters                         DONE (i965, nvc0)
+  GL_ARB_shader_draw_parameters                         DONE (i965, nvc0, radeonsi)
   GL_ARB_shader_group_vote                              DONE (nvc0)
   GL_ARB_shader_stencil_export                          DONE (i965/gen9+, radeonsi, softpipe, llvmpipe, swr)
   GL_ARB_shader_viewport_layer_array                    not started