tree 084a5fc008475a09bd164e6d0f01b252ce4e8b5c
parent 97fc96f3a1cba4e4b56b648b650736915ed574f6
author Caesar Wang <wxt@rock-chips.com> 1472085462 +0800
committer Caesar Wang <wxt@rock-chips.com> 1472085462 +0800

rockchip: rk3399: add dram driver

add dram driver, and kernel can through sip function talk to bl31 to
do ddr frequency scaling. and ddr auto powerdown.

Change-Id: I0d0f2869aed95e336c6e23ba96a9310985c84840