ath79: add support for D-Link DIR-505
This commit adds support for the D-Link DIR-505, previously supported in
ar71xx.
Hardware
--------
SoC: Atheros AR9330
FLASH: 8M SPI-NOR
RAM: 64M
WIFI: 1T1R 1SS Atheros AR9330
LED: Power green, Status red
BTN: WPS, Reset
Installation
------------
Currently, installation is only possible by sysupgrading from an earlier
OpenWrt version, U-Boot TFTP or a modded U-Boot. I do not have the
original bootloader from D-Link on my device anymore, so i cannot test
the factory image.
Signed-off-by: David Bauer <mail@david-bauer.net>