v3d: Disable PIPE_CAP_PRIMITIVE_RESTART

The hardware can only support the PIPE_CAP_PRIMITIVE_RESTART_FIXED_INDEX
subset. This will make it stop advertising the NV_primitive_restart
extension without breaking GLES 3.0 support.

v2: Update features.txt

Reviewed-by: Eric Anholt <eric@anholt.net> (v1)
Reviewed by: Erik Faye-Lund <erik.faye-lund@collabora.com>

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5559>
diff --git a/docs/features.txt b/docs/features.txt
index 791ebc4..42b7463 100644
--- a/docs/features.txt
+++ b/docs/features.txt
@@ -74,7 +74,7 @@
   Forward compatible context support/deprecations       DONE
   GL_ARB_draw_instanced (Instanced drawing)             DONE (v3d, zink)
   GL_ARB_copy_buffer (Buffer copying)                   DONE (v3d, zink)
-  GL_NV_primitive_restart (Primitive restart)           DONE (v3d)
+  GL_NV_primitive_restart (Primitive restart)           DONE ()
   16 vertex texture image units                         DONE (zink)
   GL_ARB_texture_buffer_object (Texture buffer objs)    DONE (zink)
   GL_ARB_texture_rectangle (Rectangular textures)       DONE (v3d, zink)