poky: set MAINTAINER clearly
The default Poky-specific MAINTAINER assignment makes it look like the
maintainer is a person called Poky.
Instead, use "Poky Maintainers" as the name.
(From meta-yocto rev: 8e17aeb3fd3246ae59119e3e1c693a4f9a3b3420)
Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>