arm64: dts: add LED nodes for hi6220-hikey

Add LED nodes for hi6220-hikey. There are total 6 LEDs on HiKey.
Four general purposed, one for WiFi activity, and one for Bluetooth
activity.

Signed-off-by: Guodong Xu <guodong.xu@linaro.org>
Signed-off-by: Wei Xu <xuwei5@hisilicon.com>
1 file changed