Enable xref broken warnings. While here, change the output to
only show cross-references, as there's no need to show the entire cec.h
header at the docs.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 Documentation/userspace-api/media/cec/cec-header.rst | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/Documentation/userspace-api/media/cec/cec-header.rst b/Documentation/userspace-api/media/cec/cec-header.rst
index f67003bb8740..648498bc7d6f 100644
--- a/Documentation/userspace-api/media/cec/cec-header.rst
+++ b/Documentation/userspace-api/media/cec/cec-header.rst
@@ -2,10 +2,12 @@
 
 .. _cec_header:
 
-***************
-CEC Header File
-***************
+****************
+CEC uAPI Symbols
+****************
 
 .. kernel-include:: include/uapi/linux/cec.h
     :generate-cross-refs:
     :exception-file: cec.h.rst.exceptions
+    :toc:
+    :warn-broken:
-- 
2.51.0