[PATCH] Documentation: gpu: add acceleration node section

[Dylan Le <self@dylanle.dev>]

This patch was initially written for the Linux Kernel Bug Fixing Mentorship
program. The patch adds a temporarily stubbed section on Acceleration Nodes
to resolve a documentation warning.

This resolves the warning:
./Documentation/gpu/drm-internals:179: ./include/drm/drm_file.h:411: WARNING: undefined label: drm_accel_node

I would appreciate any feedback on what should be documented here.

Signed-off-by: Dylan Le <self@dylanle.dev>
---
 Documentation/gpu/drm-uapi.rst | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/Documentation/gpu/drm-uapi.rst b/Documentation/gpu/drm-uapi.rst
index ce47b4292..d25539862 100644
--- a/Documentation/gpu/drm-uapi.rst
+++ b/Documentation/gpu/drm-uapi.rst
@@ -175,6 +175,15 @@ other hand, a driver requires shared state between clients which is
 visible to user-space and accessible beyond open-file boundaries, they
 cannot support render nodes.
 
+.. _drm_accel_node:
+
+Acceleration nodes
+==================
+
+.. note::
+   There is not any documentation yet need to figure out what this is.
+
+
 Device Hot-Unplug
 =================
 
-- 
2.30.2