[RFC v2 5/8] docs: ABI: create a 2-depth index for ABI

[Mauro Carvalho Chehab <mchehab+samsung@xxxxxxxxxx>]

That helps to identify what ABI files are adding titles.

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@xxxxxxxxxx>
---
 Documentation/admin-guide/abi.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/admin-guide/abi.rst b/Documentation/admin-guide/abi.rst
index 3b9645c77469..bcab3ef2597c 100644
--- a/Documentation/admin-guide/abi.rst
+++ b/Documentation/admin-guide/abi.rst
@@ -3,7 +3,7 @@ Linux ABI description
 =====================
 
 .. toctree::
-   :maxdepth: 1
+   :maxdepth: 2
 
    abi-stable
    abi-testing
-- 
2.21.0