[PATCH] Documentation/gpu: fix Panfrost documentation build warnings

["Adrián Larumbe" <adrian.larumbe@collabora.com>]

Fix issues revealed by `make htmldocs` after adding Panfrost DRM
documentation file.

Signed-off-by: Adrián Larumbe <adrian.larumbe@collabora.com>
Fixes: d124dac2089c ("drm/panfrost: Add fdinfo support GPU load metrics")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202310030917.Txzlpoeq-lkp@intel.com
---
 Documentation/gpu/drivers.rst  | 1 +
 Documentation/gpu/panfrost.rst | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/Documentation/gpu/drivers.rst b/Documentation/gpu/drivers.rst
index 3a52f48215a3..45a12e552091 100644
--- a/Documentation/gpu/drivers.rst
+++ b/Documentation/gpu/drivers.rst
@@ -18,6 +18,7 @@ GPU Driver Documentation
    xen-front
    afbc
    komeda-kms
+   panfrost
 
 .. only::  subproject and html
 
diff --git a/Documentation/gpu/panfrost.rst b/Documentation/gpu/panfrost.rst
index ecc48ba5ac11..a07f6821e994 100644
--- a/Documentation/gpu/panfrost.rst
+++ b/Documentation/gpu/panfrost.rst
@@ -5,7 +5,7 @@
 .. _panfrost-usage-stats:
 
 Panfrost DRM client usage stats implementation
-==========================================
+==============================================
 
 The drm/Panfrost driver implements the DRM client usage stats specification as
 documented in :ref:`drm-client-usage-stats`.
-- 
2.42.0