rockchip: dts: rk3328: add dmc node

Add a dmc node for sdram driver.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
diff --git a/arch/arm/dts/rk3328.dtsi b/arch/arm/dts/rk3328.dtsi
index f18cfc2..50e5df5 100644
--- a/arch/arm/dts/rk3328.dtsi
+++ b/arch/arm/dts/rk3328.dtsi
@@ -184,6 +184,7 @@
 	};
 
 	grf: syscon@ff100000 {
+		u-boot,dm-pre-reloc;
 		compatible = "rockchip,rk3328-grf", "syscon", "simple-mfd";
 		reg = <0x0 0xff100000 0x0 0x1000>;
 		#address-cells = <1>;
@@ -350,6 +351,12 @@
 		status = "disabled";
 	};
 
+	dmc: dmc@ff400000 {
+		u-boot,dm-pre-reloc;
+		compatible = "rockchip,rk3328-dmc", "syscon";
+		reg = <0x0 0xff400000 0x0 0x1000>;
+	};
+
 	cru: clock-controller@ff440000 {
 		compatible = "rockchip,rk3328-cru", "rockchip,cru", "syscon";
 		reg = <0x0 0xff440000 0x0 0x1000>;