arm64: dts: allwinner: h6: orangepi: Disable OTG mode

As can be seen from OrangePi Lite 2 and One Plus schematics, VBUS pin on
USB OTG port is directly connected to 5 V power supply. This mean that
OTG port can safely operate only in host mode, even though these two
boards have ID pin connected.
Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>

arch/arm64/boot/dts/allwinner/sun50i-h6-orangepi.dtsi

@@ -251,7 +251,12 @@ &uart0 {
 };
 
 &usb2otg {
-	dr_mode = "otg";
+	/*
+	 * OrangePi Lite 2 and One Plus, where this DT is used, don't
+	 * have a controllable VBUS even though they do have an ID pin.
+	 * Using it as anything but a USB host is unsafe.
+	 */
+	dr_mode = "host";
 	status = "okay";
 };