arm64: dts: rockchip: enable otg/drd operation of usb_host0_xhci in rk356x

This USB 3.0 controller is capable of OTG/DRD operation. Enable it in the
device tree.
Signed-off-by: NMichael Riesch <michael.riesch@wolfvision.net>
Link: https://lore.kernel.org/r/20220425133502.405512-1-michael.riesch@wolfvision.netSigned-off-by: NHeiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk356x.dtsi

@@ -266,7 +266,7 @@
 			 <&cru ACLK_USB3OTG0>;
 		clock-names = "ref_clk", "suspend_clk",
 			      "bus_clk";
-		dr_mode = "host";
+		dr_mode = "otg";
 		phy_type = "utmi_wide";
 		power-domains = <&power RK3568_PD_PIPE>;
 		resets = <&cru SRST_USB3OTG0>;