MAINTAINERS: update GPIO maintainers entry
MAINTAINERS: update GPIO maintainers entry

Add Alexandre Courbot as co-maintainer of the GPIO subsystem.
Provide a pointer to the GPIO GIT tree. Update the documentation
file path. Move around to put people and git tree on top.

Acked-by: Alexandre Courbot <65cb6c989b5ca9e749bdf49f881cbebafb9afedc@gmail.com>
Signed-off-by: Linus Walleij <9cd9d802d23c0ed5e224beabf4ae4a5c478746ef@linaro.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs