arm64: dts: rockchip: enable PCIe on ROCK 4D

The RADXA ROCK 4D board has a PCIe controller connected to a flat flex
connector, compatible with the one the RPi5 uses.

Enable the associated combphy and pcie controller node, as well as add
the remaining pinctrl definition for the reset.

Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli@collabora.com>
Link: https://lore.kernel.org/r/20250621-rk3576-rock4d-pcie-v1-1-2b33c9f12955@collabora.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

Author: Nicolas Frattaroli

arch/arm64/boot/dts/rockchip/rk3576-rock-4d.dts

@@ -194,6 +194,10 @@
 	};
 };
 
+&combphy0_ps {
+	status = "okay";
+};
+
 &combphy1_psu {
 	status = "okay";
 };
@@ -652,6 +656,14 @@
 	};
 };
 
+&pcie0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pcie_reset>;
+	reset-gpios = <&gpio2 RK_PB4 GPIO_ACTIVE_HIGH>;
+	vpcie3v3-supply = <&vcc_3v3_pcie>;
+	status = "okay";
+};
+
 &pinctrl {
 	hym8563 {
 		hym8563_int: hym8563-int {
@@ -678,6 +690,9 @@
 		pcie_pwren: pcie-pwren {
 			rockchip,pins = <2 RK_PD3 RK_FUNC_GPIO &pcfg_pull_none>;
 		};
+		pcie_reset: pcie-reset {
+			rockchip,pins = <2 RK_PB4 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
 	};
 
 	usb {