The current set of TP-Link devices with ar7240 SoC all share
the same DTSI file. As the latter is very similar to the
definition required for the to-be-supported TP-Link TL-WA devices
with ar7240, this patch splits the definitions into a shared part
for all TP-Link devices (ar7240_tplink.dtsi) and a file containing
the specific setup for the present TL-WR devices
(ar7240_tplink_tl-wr.dtsi), equivalent to the former
ar7240_tplink_tl-wr74xn-v1.dtsi.

While at it, remove unused firmware partition label and rename
pinmux_switch_led_pins.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

Add missing SoC specific compatibles and/or inherit the family
compatibles like "ubnt,xm".

Signed-off-by: Mathias Kresin <dev@kresin.me>

This patch did the following things:
1. Separate ath9k-leds out of gpio leds so that all other leds will work
   before ath9k loded (e.g. during preinit/init stage).
2. Rename wps led to qss since that's how TP-Link mark it.
3. Rename LED prefix to tp-link because that dts is shared by many devices.
4. Rename to wr740n-v1 because v1 is the first and v2 just use the fw of v1.
   (This will require a forced sysupgrade if you comes from
   the previous wr740n v2 image.)
5. Remove SUPPORTED_DEVICES.
   (tl-wr740n-v2 doesn't exist anywhere so it's useless.)
6. Add all WR741ND v1 clones found in ar71xx.

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