arm: dts: rockchip: remove upstreamed props for Radxa ROCK 5B

"usb_host1_xhci" and related node were already upstreamed. remove
unnecessary properties from u-boot.dtsi.

Signed-off-by: FUKAUMI Naoki <naoki@radxa.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/arch/arm/dts/rk3588-rock-5b-u-boot.dtsi b/arch/arm/dts/rk3588-rock-5b-u-boot.dtsi
index 8e318e6..4dd17ff 100644
--- a/arch/arm/dts/rk3588-rock-5b-u-boot.dtsi
+++ b/arch/arm/dts/rk3588-rock-5b-u-boot.dtsi
@@ -39,18 +39,6 @@
 	status = "okay";
 };
 
-&u2phy1 {
-	status = "okay";
-};
-
-&u2phy1_otg {
-	status = "okay";
-};
-
-&usbdp_phy1 {
-	status = "okay";
-};
-
 &usbdp_phy0 {
 	status = "okay";
 };
@@ -60,8 +48,3 @@
 	maximum-speed = "high-speed";
 	status = "okay";
 };
-
-&usb_host1_xhci {
-	dr_mode = "host";
-	status = "okay";
-};