ddr: fip:c1/a1 improve ramdump and DDR g12_d2pll process [2/2]

PD#SWPL-25565

Problem:
g12_d2pll process force COLD_BOOT before;

Solution:
g12_d2pll process save sticky reg,
restore sticky reg when finish g12_d2pll;

Verify:
test pass at c1/a1

Change-Id: I9f853bcc6c54c7e8fdbcfa4a8c0c9f4ae9adcc0f
Signed-off-by: zhiguang.ouyang <zhiguang.ouyang@amlogic.com>
2 files changed