ar71xx: add kernel support for the TP-LINK TL-WR710N v1 board

Small router sold in EU: AR9330@400MHz, 1x USB2.0,
2x ethernet, 8MB flash, 32MB ram, one led, one button.

See: http://galeria.tech-blog.pl/TP-Link_TL-WR710N-EU/



[juhosg: use a separate kernel patch]

Signed-off-by: Cezary Jackiewicz <cezary.jackiewicz@gmail.com>
Patchwork: http://patchwork.openwrt.org/patch/3873/


Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@37572 3c298f89-4303-0410-b956-a3cf2f4a3e73