ath79: add support for LevelOne WAB-8010

ath79: add support for LevelOne WAB-8010

Hardware
--------
Qualcomm Atheros QCA9563
64M DDR2 RAM
16M SPI-NOR (Macronix MX25L12805D)
Qualcomm Atheros AR8334
Qualcomm Atheros QCA9886 2T2R 802.11ac Wave 2

Button: Reset-Button, Mode-Switch
LED:    WLAN, ETH0/1, RSSI, SYS

UART: Pinholes next to CPU (labled)
      Don't connect 3V3!
      115200 - 8N1

Installation
------------

Rename the tftp factory-image to upgrade.bin and make it available using
a tftp server with the IP address 192.168.0.141/24.

Connect your computer to the WAN port of the AP. Power on the AP while
keeping the reset-button pressed.

The device will install OpenWrt and reboot afterwards.

Vendor-FW shell-access
----------------------

Shell-access to the vendor-firmware can be obtained by configuring the
remote-syslog server to "$(passwd -d root)". Password-less root-access
is possible afterwards usin the already running telnet/SSH server or
UART console.

Signed-off-by: David Bauer <mail@david-bauer.net>