S6: PXP Bringup Bootloader BL30 code portinig [2/3]

PD#SWPL-153508

Problem:
S6 PXP Bringup Bootloader BL30.

Solution:
Code porting from s7d and ucode.

Verify:
Test in S6 PXP.

Change-Id: Id593842328d9fd0656ae6f5a7307bf89572b362d
Signed-off-by: bangzheng.liu <bangzheng.liu@amlogic.com>
16 files changed