ath79: add support for TP-Link TL-WR1045ND v2

ath79: add support for TP-Link TL-WR1045ND v2

Specifications:
 - QCA9558 Soc
 - 720/800 (CPU/DDR)
 - 1x 10/100/1000 Mbps WAN Ethernet
 - 4x 10/100/1000 Mbps LAN Ethernet
 - 64 MB RAM (DDR2)
 - 8 MB FLASH
 - QCA9558 2.4 GHz 802.11bgn
 - 1x USB 2.0

Flash instruction
WebUI:
Download *-factory.bin image, rename to tp_firmware.bin and upload
it via the firmwary upgrade function of the stock firmware WebUI.

Tftp:
Rename OpenWRT or original firmware to wr1045v2_tp_recovery.bin and
Change your computer ip in 192.168.0.66 and subnet mask in 255.255.255.0.
Router will obtain IP 192.168.0.86 for a few seconds while loading,
when reset button pressed at power On.

Signed-off-by: Rasim Kalimullin <neutrino.vm@gmail.com>
[rebased onto base-files split]
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>