This adds support for ZyXEL NBG6616 uboot-env access Signed-off-by: Christoph Krapp <achterin@googlemail.com> [add "ar71xx" to commit title] Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de> Signed-off-by: maurerr <mariusd84@gmail.com>