While the stock firmware and previous ar71xx versions of openwrt used the
single ethernet port as a DHCP client, for unmodified openwrt usage it
makes more sense to do the standard openwrt thing and make the ethernet
port a static lan with known address so that users can find the device on
the network more easily.
Signed-off-by: Daniel F. Dickinson <cshored@thecshore.com>