Add Netgear WNDR3700v2 to the list of supported boards.
Signed-off-by: Michal Cieslakiewicz <michal.cieslakiewicz@wp.pl>
[rebase, adjusted commit title]
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
(cherry picked from commit a09408fa576c6482c21f683662cb2d5a49e14ecf)