arm64: dts: rockchip: rk3588-evb2: set dr_mode to peripheral

Set the dr_mode to peripheral for rk3588-evb2 and
rk3588s-evb2 which can't support usb mode detection
automatically for the time being.

In the near future, we will support usb device/host
mode switch by software, then we can revert this patch.

Signed-off-by: William Wu <william.wu@rock-chips.com>
Change-Id: I618b7e32eabb2b4106f0f844125fca5c85ce33c8

arch/arm64/boot/dts/rockchip/rk3588-evb2-lp4.dtsi

@@ -482,6 +482,11 @@
 	rockchip,dp-lane-mux = <2 3>;
 };
 
+&usbdrd_dwc3_0 {
+	dr_mode = "peripheral";
+	status = "okay";
+};
+
 &uart9 {
 	status = "okay";
 	pinctrl-names = "default";

arch/arm64/boot/dts/rockchip/rk3588s-evb2-lp5.dtsi

@@ -923,5 +923,6 @@
 };
 
 &usbdrd_dwc3_0 {
+	dr_mode = "peripheral";
 	maximum-speed = "high-speed";
 };