[U-Boot] [RFC PATCH 6/9] doc: Add architecture specific info to Sphinx TOC tree

[Bin Meng]

Add index.rst for architecture specific info. More docs will be
added later.

Signed-off-by: Bin Meng <bmeng.cn at gmail.com>
---

 doc/arch/index.rst |  6 ++++++
 doc/index.rst      | 11 +++++++++++
 2 files changed, 17 insertions(+)
 create mode 100644 doc/arch/index.rst

diff --git a/doc/arch/index.rst b/doc/arch/index.rst
new file mode 100644
index 0000000..920043a
--- /dev/null
+++ b/doc/arch/index.rst
@@ -0,0 +1,6 @@
+=========================
+Architecture-specific doc
+=========================
+
+.. toctree::
+   :maxdepth: 2
diff --git a/doc/index.rst b/doc/index.rst
index 835decf..562f1b7 100644
--- a/doc/index.rst
+++ b/doc/index.rst
@@ -40,6 +40,17 @@ needed).
 
    api/index
 
+Architecture-specific doc
+-------------------------
+
+These books provide programming details about architecture-specific
+implementation.
+
+.. toctree::
+   :maxdepth: 2
+
+   arch/index
+
 Indices and tables
 ==================
 
-- 
2.7.4