ath79: add support for TP-Link TL-WA1201 v2

This device is a wireless access point working on the 2.4 GHz and 5 GHz
band, based on Qualcomm/Atheros QCA9563 + QCA9886.

Specification
- 775 MHz CPU
- 128 MB of RAM (DDR2)
- 16 MB of FLASH (SPI NOR)
- QCA9563: 2.4 GHz 3x3
- QCA9886: 5 GHz
- AR8033: 1x 1 Gbs Ethernet
- 4x LED, WPS factory reset and power button
- bare UART on PCB (accessible through testpoints)

Methods for Flashing:
- Apply factory image in OEM firmware web-gui. Wait a minute after the
  progress bar completes and restart the device.
- Sysupgrade on top of existing OpenWRT image
- Solder wires onto UART testpoints and attach a terminal.
  Boot the device and press enter to enter u-boot's menu. Then issue the
  following commands
  1. setenv serverip your-server-ip
     setenv ipaddr your-device-ip
  2. tftp 0x80060000 openwrt-squashfs.bin (Rembember output of size in
    hex, henceforth "sizeinhex")
  3. erase 0x9f030000 +"sizeinhex"
  4. cp.b 0x80060000 0x9f030000 0x"sizeinhex"
  5. reboot

Recover:
- U-boot serial console

Signed-off-by: Robert Balas <balasr@iis.ee.ethz.ch>
[convert to nvmem]
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

target/linux/ath79/generic/base-files/etc/board.d/01_leds

@@ -19,7 +19,8 @@ glinet,gl-ar300m-lite|\
 glinet,gl-ar300m16|\
 pcs,cap324|\
 tplink,cpe610-v1|\
-tplink,cpe610-v2)
+tplink,cpe610-v2|\
+tplink,tl-wa1201-v2)
 	ucidef_set_led_netdev "lan" "LAN" "green:lan" "eth0"
 	;;
 alfa-network,n2q)

target/linux/ath79/generic/base-files/etc/board.d/02_network

@@ -72,6 +72,7 @@ ath79_setup_interfaces()
 	tplink,re450-v2|\
 	tplink,re450-v3|\
 	tplink,re455-v1|\
+	tplink,tl-wa1201-v2|\
 	tplink,tl-wr902ac-v1|\
 	ubnt,bullet-ac|\
 	ubnt,bullet-m-ar7240|\

target/linux/ath79/generic/base-files/etc/hotplug.d/firmware/11-ath10k-caldata

@@ -229,7 +229,8 @@ case "$FIRMWARE" in
 	tplink,archer-c60-v2|\
 	tplink,archer-c60-v3|\
 	tplink,archer-c6-v2|\
-	tplink,archer-c6-v2-us)
+	tplink,archer-c6-v2-us|\
+	tplink,tl-wa1201-v2)
 		caldata_extract "art" 0x5000 0x2f20
 		ath10k_patch_mac $(macaddr_add $(mtd_get_mac_binary info 0x8) -1)
 		ln -sf /lib/firmware/ath10k/pre-cal-pci-0000\:00\:00.0.bin \