Use the README as license fallback if a license file is missing. Use the
linenumbers parameter of get_license_md5sums function to determine the
license text inside the README.
Signed-off-by: Stefan Herbrechtsmeier <stefan.herbrechtsmeier@weidmueller.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>