docs/features: Add missing Panfrost extensions

Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6609>
diff --git a/docs/features.txt b/docs/features.txt
index c6f9240..7028870 100644
--- a/docs/features.txt
+++ b/docs/features.txt
@@ -103,7 +103,7 @@
   GL_ARB_explicit_attrib_location                       DONE (all drivers that support GLSL)
   GL_ARB_occlusion_query2                               DONE (freedreno, swr, v3d, zink, panfrost)
   GL_ARB_sampler_objects                                DONE (all drivers)
-  GL_ARB_shader_bit_encoding                            DONE (freedreno, swr, v3d)
+  GL_ARB_shader_bit_encoding                            DONE (freedreno, swr, v3d, panfrost)
   GL_ARB_texture_rgb10_a2ui                             DONE (freedreno, swr, zink, panfrost)
   GL_ARB_texture_swizzle                                DONE (freedreno, swr, v3d, zink, panfrost)
   GL_ARB_timer_query                                    DONE (freedreno, swr)
@@ -134,7 +134,7 @@
   GL_ARB_tessellation_shader                            DONE (i965/gen7+, swr)
   GL_ARB_texture_buffer_object_rgb32                    DONE (freedreno, i965/gen6+, softpipe, swr)
   GL_ARB_texture_cube_map_array                         DONE (i965/gen6+, nv50, softpipe, swr, zink)
-  GL_ARB_texture_gather                                 DONE (freedreno, i965/gen6+, nv50, softpipe, swr, v3d)
+  GL_ARB_texture_gather                                 DONE (freedreno, i965/gen6+, nv50, softpipe, swr, v3d, panfrost)
   GL_ARB_texture_query_lod                              DONE (freedreno, i965, nv50, softpipe, swr, v3d, panfrost)
   GL_ARB_transform_feedback2                            DONE (i965/gen6+, nv50, softpipe, swr, v3d, panfrost)
   GL_ARB_transform_feedback3                            DONE (i965/gen7+, softpipe, swr)
@@ -184,7 +184,7 @@
   GL_ARB_robust_buffer_access_behavior                  DONE (i965)
   GL_ARB_shader_image_size                              DONE (freedreno/a5xx+, i965, softpipe, v3d)
   GL_ARB_shader_storage_buffer_object                   DONE (freedreno/a5xx+, i965, softpipe, v3d, panfrost)
-  GL_ARB_stencil_texturing                              DONE (freedreno, i965/hsw+, nv50, softpipe, swr, v3d)
+  GL_ARB_stencil_texturing                              DONE (freedreno, i965/hsw+, nv50, softpipe, swr, v3d, panfrost)
   GL_ARB_texture_buffer_range                           DONE (freedreno, nv50, i965, softpipe, swr)
   GL_ARB_texture_query_levels                           DONE (all drivers that support GLSL 1.30)
   GL_ARB_texture_storage_multisample                    DONE (all drivers that support GL_ARB_texture_multisample)