ar71xx: Add support for PISEN TS-D084

PISEN TS-D084 is an wireless router with a battery and integrated power supply based on Atheros AR9331.

Specification:

- 400/400/200 MHz (CPU/DDR/AHB)
- 64 MB of RAM (DDR2)
- 8 MB of FLASH (SPI NOR)
- 1x 10/100 Mbps Ethernet
- 1T1R 2.4 GHz (AR9331)
- 1x USB 2.0

Flash instruction:
The manufacturer are using exactly the same firmware header as TP-LINK TL-WR703N (including device ID!). Simply upload the factory firmware into WebUI and flashing is done.

Signed-off-by: Chuanhong Guo <gch981213@gmail.com>

target/linux/ar71xx/base-files/etc/board.d/02_network

@@ -139,6 +139,7 @@ ar71xx_setup_interfaces()
 	tl-wr802n-v1|\
 	tl-wr802n-v2|\
 	tl-wr902ac-v1|\
+	ts-d084|\
 	tube2h|\
 	unifi|\
 	unifiac-lite|\

target/linux/ar71xx/base-files/etc/diag.sh

@@ -208,6 +208,7 @@ get_status_led() {
 		;;
 	e600g-v2|\
 	oolite-v5.2-dev|\
+	ts-d084|\
 	wifi-pineapple-nano)
 		status_led="$board:blue:system"
 		;;