ram: rk3328: use common sdram driver

RK3328 has a similar controller and phy with PX30, so we can use the
common driver for it and remove the duplicate 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/rk3328-sdram-ddr3-666.dtsi b/arch/arm/dts/rk3328-sdram-ddr3-666.dtsi
index d99e7e0..3e88ed4 100644
--- a/arch/arm/dts/rk3328-sdram-ddr3-666.dtsi
+++ b/arch/arm/dts/rk3328-sdram-ddr3-666.dtsi
@@ -14,6 +14,8 @@
 		0x0
 		0x10
 		0x10
+		0x10
+		0x10
 		0
 
 		0x9028b189
@@ -26,6 +28,8 @@
 
 		333
 		3
+		1
+		0
 		0
 
 		0x00000000