clk: rockchip: add rk3399 ddr clock support

add ddrc clock setting, so we can do ddr frequency
scaling on rk3399 platform in future.

Signed-off-by: Lin Huang <hl@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
This commit is contained in:
Lin Huang 2016-08-22 11:36:19 +08:00 • committed by Heiko Stuebner
commit 464b9eeb97