dts: r2pro: try to fix usb top port

- extcon is no more needed in 5.19
  51a9b2c ("phy: rockchip-inno-usb2: Handle ID IRQ")
- dr_mode was changed to otg in rk356x.dtsi
  bc405bb ("arm64: dts: rockchip: enable otg/drd
    operation of usb_host0_xhci in rk356x")

but hostmode still not working

arch/arm64/boot/dts/rockchip/rk3568-bpi-r2-pro.dts

@@ -678,7 +678,7 @@
 };
 
 &usb_host0_xhci {
-	extcon = <&usb2phy0>;
+	dr_mode = "host";
 	status = "okay";
 };