suspend: A4 suspend in bl30 [1/2]

PD#SWPL-115362

Problem:
Add A4 suspend function

Solution:
Add code.

Verify:
A4_ba409

Change-Id: I89c744e246c77a3185af0db3f1cba2c3f60cc40b
Signed-off-by: Jianyi Shi <jianyi.shi@amlogic.com>
2 files changed