Fix an error: This project needs at least Sphinx v2.4.4. Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Out documentation directory is doc/ and not docs/. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
readthedocs.org allows to automatically generate and publish the HTML documentation for the U-Boot project. Add a file controlling building https://u-boot.readthedocs.io/. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>