tree d4c567887bcef5208a82454cb2ae73a3b93a6032
parent 82d9eb65b11e5692522c13c495ee3c9d8dbe99b4
author Bai Ping <ping.bai@nxp.com> 1528633365 +0800
committer Jacky Bai <ping.bai@nxp.com> 1548413476 +0800

plat: imx8m: add a common dram PM code for imx8m soc

re-design the dram power management code to make it more
common for all i.MX8M SOCs. code need to refact and optimize
to make more better. Using this common code on i.MX8MM first,
for i.MX8MQ, will move to this later.

Signed-off-by: Bai Ping <ping.bai@nxp.com>
(cherry picked from commit 8b2305c1464839bdf2683f8ece9482c52cd30720)