panfrost: enable DrawTransformFeedback*

This is needed for ARB_transform_feedback2, which I plan on requiring
for ES3. Also update docs/features.txt

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6247>
diff --git a/docs/features.txt b/docs/features.txt
index 81afea4..13a9643 100644
--- a/docs/features.txt
+++ b/docs/features.txt
@@ -136,7 +136,7 @@
   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_query_lod                              DONE (freedreno, i965, nv50, softpipe, swr, v3d, panfrost)
-  GL_ARB_transform_feedback2                            DONE (i965/gen6+, nv50, softpipe, swr, v3d)
+  GL_ARB_transform_feedback2                            DONE (i965/gen6+, nv50, softpipe, swr, v3d, panfrost)
   GL_ARB_transform_feedback3                            DONE (i965/gen7+, softpipe, swr)