poweroff: A4 rtc mode in bl30 [1/1]

PD#SWPL-115365

Problem:
Add A4 rtc mode function

Solution:
Add code.

Verify:
A4_ba409

Change-Id: I4b26bd672bb620e0501f316f078870edcd533e2c
Signed-off-by: Jianyi Shi <jianyi.shi@amlogic.com>
2 files changed