[PATCH 4/6] docs: i2c: index.rst: add slave-testunit-backend.rst

[Mauro Carvalho Chehab]

As warned by Sphinx:

	.../Documentation/i2c/slave-testunit-backend.rst: WARNING: document isn't included in any toctree

This document is not included anywhere.

Fixes: a8335c64c5f0 ("i2c: add slave testunit driver")
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx>
---
 Documentation/admin-guide/hw-vuln/l1d_flush.rst | 3 +--
 Documentation/i2c/index.rst                     | 1 +
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/Documentation/admin-guide/hw-vuln/l1d_flush.rst b/Documentation/admin-guide/hw-vuln/l1d_flush.rst
index adc4ecc72361..f794e2b1096c 100644
--- a/Documentation/admin-guide/hw-vuln/l1d_flush.rst
+++ b/Documentation/admin-guide/hw-vuln/l1d_flush.rst
@@ -22,8 +22,7 @@ mechanism
 Usage Guidelines
 ----------------
 
-Please see document: :ref:`Documentation/userspace-api/spec_ctrl.rst` for
-details.
+Please see document: :doc:`/userspace-api/spec_ctrl` for details.
 
 **NOTE**: The feature is disabled by default, applications need to
 specifically opt into the feature to enable it.
diff --git a/Documentation/i2c/index.rst b/Documentation/i2c/index.rst
index 8a2ad3845191..9b8df313902c 100644
--- a/Documentation/i2c/index.rst
+++ b/Documentation/i2c/index.rst
@@ -38,6 +38,7 @@ Debugging
 
    gpio-fault-injection
    i2c-stub
+   slave-testunit-backend
 
 Slave I2C
 =========
-- 
2.26.2