S6: PXP Bringup Bootloader BL30 code portinig [1/3]

PD#SWPL-153508

Problem:
S6 PXP Bringup Bootloader BL30.

Solution:
Code porting from s7d and ucode.

Verify:
Test in S6 PXP.

Change-Id: I7623468baea615876e1b9d940359964c267165de
Signed-off-by: bangzheng.liu <bangzheng.liu@amlogic.com>
17 files changed