ar71xx: Build images for Netgear WNDRMAC and WNDRMACv2

ar71xx: Build images for Netgear WNDRMAC and WNDRMACv2

The WNDRMAC is a WNDR3700v2 (64MB RAM, 16MB flash) in a white case. The
WNDRMACv2 is a WNDR3800 (128MB RAM, 16MB flash) in a WNDRMAC case.

The WNDRMAC case doesn't have "holes" or labels for the 2.4GHz LED or
switch ports 2-4. The stock firmware uses a single LED (in the 5GHz
position) to indicate the status of both radios, and a single LED (in the
switch port 1 position) to indicate the status of all LAN ports. The
"missing" LEDs are present on the board, and easily shine through the
case. Unlike the stock firmware, OpenWrt will use these "hidden" LEDs.

I've tested the WNDRMACv2 image. I don't have a v1 WNDRMAC, but assume
that this is sufficient to build a fully-functional image.

Signed-off-by: Mark Mentovai <mark@moxienet.com>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@29513 3c298f89-4303-0410-b956-a3cf2f4a3e73