arm64: dts: add FriendlyElec's rk3588-nanopc-t6-lts DT

- From vendor's tree at https://github.com/friendlyarm/kernel-rockchip branch nanopi6-v6.1.y sha1 925eb8ba4c765d4282a7281ddc6559a6e45c2687
- Adapted vendor's nomenclature (rev07 -> rk3588-nanopc-t6-lts.dts)
  - adapted include (rev01 -> rk3588-nanopc-t6.dts)
- this requires the `vcc5v0_host20_en` node added in previous commit to the `t6` DT
- add to Makefile

arch/arm64/boot/dts/rockchip/Makefile

@@ -291,6 +291,7 @@ dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3588-armsom-w3.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3588-armsom-sige7.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3588-nanopc-cm3588-nas.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3588-nanopc-t6.dtb
+dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3588-nanopc-t6-lts.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3588-nvr-demo-v10.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3588-nvr-demo-v10-android.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3588-nvr-demo-v10-ipc-4x-linux.dtb

arch/arm64/boot/dts/rockchip/rk3588-nanopc-t6-lts.dts

@@ -0,0 +1,34 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (c) 2023 FriendlyElec Computer Tech. Co., Ltd.
+ * (http://www.friendlyelec.com)
+ */
+
+/dts-v1/;
+#include "rk3588-nanopc-t6.dts"
+
+/ {
+	model = "FriendlyElec NanoPC-T6 LTS";
+	compatible = "friendlyelec,nanopc-t6", "rockchip,rk3588";
+
+	vcc5v0_host_20: vcc5v0-host-20 {
+		compatible = "regulator-fixed";
+		enable-active-high;
+		gpio = <&gpio1 RK_PA4 GPIO_ACTIVE_HIGH>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&vcc5v0_host20_en>;
+		regulator-name = "vcc5v0_host_20";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		vin-supply = <&vcc5v0_usb>;
+	};
+};
+
+&mach {
+	hwrev = <7>;
+	model = "NanoPC-T6 LTS";
+};
+
+&u2phy3_host {
+	phy-supply = <&vcc5v0_host_20>;
+};