ram: rk3399: migrate to use common code

For there are some structures and functions are common for all rockchip SoCs,
migrate to use the common code so that we can clean up reduandent codes.

Signed-off-by: YouMin Chen <cym@rock-chips.com>
Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/arch/arm/dts/rk3399-sdram-ddr3-1333.dtsi b/arch/arm/dts/rk3399-sdram-ddr3-1333.dtsi
index 3708bd6..7fae249 100644
--- a/arch/arm/dts/rk3399-sdram-ddr3-1333.dtsi
+++ b/arch/arm/dts/rk3399-sdram-ddr3-1333.dtsi
@@ -13,6 +13,8 @@
 		0x0
 		0xf
 		0xf
+		0xf
+		0xf
 		1
 		0x80120e12
 		0x11030802
@@ -28,6 +30,8 @@
 		0x0
 		0xf
 		0xf
+		0xf
+		0xf
 		1
 		0x80120e12
 		0x11030802