doc: Add minimal Sphinx support

Add the essentials for supporting a Sphinx documentation build:

- A makefile under docs/ to invoke Sphinx with the desired output
- A Sphinx master configuration file (
- A single, top-level index page (index.rst)
- The logo that is integrated in the the sidebar of the
  rendered output

Change-Id: I85e67e939658638337ca7972936a354878083a25
Signed-off-by: Paul Beesley <>
4 files changed