arm64: dts: rockchip: enable ddrfreq for rk3326 linux evb board

As the other boards had support the dmc function, maybe the owner
was missing this dts configure.

In order to be better the power consumption and performance, this patch
enables the dmc and dfi to support the ddrfreq,

Change-Id: I2623943085d098a65ba6e0ad7102f671f0cedd3e
Signed-off-by: Caesar Wang <wxt@rock-chips.com>

Author: Caesar-github

arch/arm64/boot/dts/rockchip/rk3326-evb-linux-lp3-v10.dts

@@ -323,6 +323,15 @@
 	status = "disabled";
 };
 
+&dfi {
+	status = "okay";
+};
+
+&dmc {
+	center-supply = <&vdd_logic>;
+	status = "okay";
+};
+
 &emmc {
 	bus-width = <8>;
 	cap-mmc-highspeed;