docs/features: Update extensions for swr

The following are all supported:

- GL_ARB_shader_atomic_counters
- GL_ARB_shader_image_load_store
- GL_ARB_shader_image_size
- GL_ARB_texture_multisample
- GL_KHR_texture_compression_astc_ldr
- GL_KHR_texture_compression_astc_sliced_3d
- GL_OES_texture_float
- GL_OES_texture_float_linear
- GL_OES_texture_half_float
- GL_OES_texture_half_float_linear

Reviewed-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7281>
diff --git a/docs/features.txt b/docs/features.txt
index c8cf577..7929913 100644
--- a/docs/features.txt
+++ b/docs/features.txt
@@ -250,14 +250,14 @@
   GL_ARB_explicit_uniform_location                      DONE (all drivers that support GLSL)
   GL_ARB_framebuffer_no_attachments                     DONE (freedreno, i965/gen7+, softpipe)
   GL_ARB_program_interface_query                        DONE (all drivers)
-  GL_ARB_shader_atomic_counters                         DONE (freedreno/a5xx+, i965/gen7+)
-  GL_ARB_shader_image_load_store                        DONE (freedreno/a5xx+, i965/gen7+)
-  GL_ARB_shader_image_size                              DONE (freedreno/a5xx+, i965/gen7+)
+  GL_ARB_shader_atomic_counters                         DONE (freedreno/a5xx+, i965/gen7+, swr)
+  GL_ARB_shader_image_load_store                        DONE (freedreno/a5xx+, i965/gen7+, swr)
+  GL_ARB_shader_image_size                              DONE (freedreno/a5xx+, i965/gen7+, swr)
   GL_ARB_shader_storage_buffer_object                   DONE (freedreno/a5xx+, i965/gen7+)
   GL_ARB_shading_language_packing                       DONE (all drivers)
   GL_ARB_separate_shader_objects                        DONE (all drivers)
   GL_ARB_stencil_texturing                              DONE (freedreno, nv50, swr, panfrost)
-  GL_ARB_texture_multisample (Multisample textures)     DONE (freedreno/a5xx+, i965/gen7+, nv50, panfrost)
+  GL_ARB_texture_multisample (Multisample textures)     DONE (freedreno/a5xx+, i965/gen7+, nv50, panfrost, swr)
   GL_ARB_texture_storage_multisample                    DONE (all drivers that support GL_ARB_texture_multisample)
   GL_ARB_vertex_attrib_binding                          DONE (all drivers)
   GS5 Enhanced textureGather                            DONE (freedreno, i965/gen7+)
@@ -276,7 +276,7 @@
   GL_KHR_blend_equation_advanced                        DONE (freedreno/a6xx, i965, nvc0, panfrost)
   GL_KHR_debug                                          DONE (all drivers)
   GL_KHR_robustness                                     DONE (freedreno, i965, nvc0, r600)
-  GL_KHR_texture_compression_astc_ldr                   DONE (freedreno, i965/gen9+, r600, v3d, panfrost, softpipe)
+  GL_KHR_texture_compression_astc_ldr                   DONE (freedreno, i965/gen9+, r600, v3d, panfrost, softpipe, swr)
   GL_OES_copy_image                                     DONE (all drivers)
   GL_OES_draw_buffers_indexed                           DONE (all drivers that support GL_ARB_draw_buffers_blend)
   GL_OES_draw_elements_base_vertex                      DONE (all drivers)
@@ -333,7 +333,7 @@
   GL_EXT_texture_sRGB_R8                                DONE (all drivers that support GLES 3.0+)
   GL_KHR_blend_equation_advanced_coherent               DONE (i965/gen9+, panfrost)
   GL_KHR_texture_compression_astc_hdr                   DONE (i965/bxt, panfrost)
-  GL_KHR_texture_compression_astc_sliced_3d             DONE (i965/gen9+, r600, radeonsi, panfrost, softpipe)
+  GL_KHR_texture_compression_astc_sliced_3d             DONE (i965/gen9+, r600, radeonsi, panfrost, softpipe, swr)
   GL_OES_depth_texture_cube_map                         DONE (all drivers that support GLSL 1.30+)
   GL_OES_EGL_image                                      DONE (all drivers)
   GL_OES_EGL_image_external                             DONE (all drivers)
@@ -341,10 +341,10 @@
   GL_OES_required_internalformat                        DONE (all drivers)
   GL_OES_surfaceless_context                            DONE (all drivers)
   GL_OES_texture_compression_astc                       DONE (core only)
-  GL_OES_texture_float                                  DONE (freedreno, i965, r300, r600, radeonsi, nv30, nv50, nvc0, softpipe, llvmpipe, panfrost)
-  GL_OES_texture_float_linear                           DONE (freedreno, i965, r300, r600, radeonsi, nv30, nv50, nvc0, softpipe, llvmpipe, panfrost)
-  GL_OES_texture_half_float                             DONE (freedreno, i965, r300, r600, radeonsi, nv30, nv50, nvc0, softpipe, llvmpipe, panfrost)
-  GL_OES_texture_half_float_linear                      DONE (freedreno, i965, r300, r600, radeonsi, nv30, nv50, nvc0, softpipe, llvmpipe, panfrost)
+  GL_OES_texture_float                                  DONE (freedreno, i965, r300, r600, radeonsi, nv30, nv50, nvc0, softpipe, llvmpipe, panfrost, swr)
+  GL_OES_texture_float_linear                           DONE (freedreno, i965, r300, r600, radeonsi, nv30, nv50, nvc0, softpipe, llvmpipe, panfrost, swr)
+  GL_OES_texture_half_float                             DONE (freedreno, i965, r300, r600, radeonsi, nv30, nv50, nvc0, softpipe, llvmpipe, panfrost, swr)
+  GL_OES_texture_half_float_linear                      DONE (freedreno, i965, r300, r600, radeonsi, nv30, nv50, nvc0, softpipe, llvmpipe, panfrost, swr)
   GL_OES_texture_view                                   DONE (freedreno, i965/gen8+, r600, radeonsi, nv50, nvc0, softpipe, llvmpipe, swr)
   GL_OES_viewport_array                                 DONE (i965, nvc0, r600, radeonsi, softpipe)
   GLX_ARB_context_flush_control                         not started