arm64: dts: rockchip: add PCIe nodes on rk3399-rockpro64

This patch adds PCIe, PCIe phy and pinctrl (for PERST#) nodes for
RockPro64 board.
Signed-off-by: Katsuhiro Suzuki <katsuhiro@katsuster.net>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dts

@@ -513,6 +513,20 @@ &io_domains {
 	gpio1830-supply = <&vcc_3v0>;
 };
 
+&pcie0 {
+	ep-gpios = <&gpio2 RK_PD4 GPIO_ACTIVE_HIGH>;
+	num-lanes = <4>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&pcie_perst>;
+	vpcie12v-supply = <&vcc12v_dcin>;
+	vpcie3v3-supply = <&vcc3v3_pcie>;
+	status = "okay";
+};
+
+&pcie_phy {
+	status = "okay";
+};
+
 &pmu_io_domains {
 	pmu1830-supply = <&vcc_3v0>;
 	status = "okay";
@@ -542,6 +556,10 @@ diy_led_gpio: diy_led-gpio {
 	};
 
 	pcie {
+		pcie_perst: pcie-perst {
+			rockchip,pins = <2 RK_PD4 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+
 		pcie_pwr_en: pcie-pwr-en {
 			rockchip,pins = <1 RK_PD0 RK_FUNC_GPIO &pcfg_pull_none>;
 		};