arm64: dts: rockchip: set dwc3 dr_mode as otg for rk3399-box

rk3399-box Type-C0 USB needs to support peripheral mode
and host mode, so we set dr_mode as otg.

Change-Id: If94cdca3ec1d018c3f9aad14bb2c1e15e10e9c51
Signed-off-by: Wu Liang feng <wulf@rock-chips.com>

Author: wuliangfeng

arch/arm64/boot/dts/rockchip/rk3399-box-808-android.dts

@@ -603,7 +603,7 @@
 };
 
 &usbdrd_dwc3_0 {
-	dr_mode = "peripheral";
+	dr_mode = "otg";
 	status = "okay";
 };
 

arch/arm64/boot/dts/rockchip/rk3399-box.dtsi

@@ -800,7 +800,7 @@
 };
 
 &usbdrd_dwc3_0 {
-	dr_mode = "peripheral";
+	dr_mode = "otg";
 	status = "okay";
 };