SoC s6: Led: support bl30 led driver [1/1]

PD#SWPL-172927

Problem:
there is no led driver

Solution:
add led support

Verify:
s6 bl208

Change-Id: Ib600a5adb8d7b81679d4e604e3ec23476df645ee
Signed-off-by: Junyi Zhao <junyi.zhao@amlogic.com>
7 files changed