arm64: tegra: Enable PCIe slots in P3737-0000 board

Enable PCIe controller nodes to enable respective PCIe slots on
P3737-0000 board. Following is the ownership of slots by different
PCIe controllers.
Controller-1 : On-board Broadcom WiFi controller
Controller-4 : M.2 Key-M slot
Controller-5 : CEM form-factor x8 slot
Signed-off-by: Vidya Sagar <vidyas@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

arch/arm64/boot/dts/nvidia/tegra234-p3737-0000+p3701-0000.dts

@@ -2111,4 +2111,55 @@ sound {
 
 		label = "NVIDIA Jetson AGX Orin APE";
 	};
+
+	pcie@14100000 {
+		status = "okay";
+
+		vddio-pex-ctl-supply = <&vdd_1v8_ao>;
+
+		phys = <&p2u_hsio_3>;
+		phy-names = "p2u-0";
+	};
+
+	pcie@14160000 {
+		status = "okay";
+
+		vddio-pex-ctl-supply = <&vdd_1v8_ao>;
+
+		phys = <&p2u_hsio_4>, <&p2u_hsio_5>, <&p2u_hsio_6>,
+		       <&p2u_hsio_7>;
+		phy-names = "p2u-0", "p2u-1", "p2u-2", "p2u-3";
+	};
+
+	pcie@141a0000 {
+		status = "okay";
+
+		vddio-pex-ctl-supply = <&vdd_1v8_ls>;
+		vpcie3v3-supply = <&vdd_3v3_pcie>;
+		vpcie12v-supply = <&vdd_12v_pcie>;
+
+		phys = <&p2u_nvhs_0>, <&p2u_nvhs_1>, <&p2u_nvhs_2>,
+		       <&p2u_nvhs_3>, <&p2u_nvhs_4>, <&p2u_nvhs_5>,
+		       <&p2u_nvhs_6>, <&p2u_nvhs_7>;
+		phy-names = "p2u-0", "p2u-1", "p2u-2", "p2u-3", "p2u-4",
+			    "p2u-5", "p2u-6", "p2u-7";
+	};
+
+	pcie-ep@141a0000 {
+		status = "disabled";
+
+		vddio-pex-ctl-supply = <&vdd_1v8_ls>;
+
+		reset-gpios = <&gpio TEGRA234_MAIN_GPIO(AF, 1) GPIO_ACTIVE_LOW>;
+
+		nvidia,refclk-select-gpios = <&gpio_aon
+					      TEGRA234_AON_GPIO(AA, 4)
+					      GPIO_ACTIVE_HIGH>;
+
+		phys = <&p2u_nvhs_0>, <&p2u_nvhs_1>, <&p2u_nvhs_2>,
+		       <&p2u_nvhs_3>, <&p2u_nvhs_4>, <&p2u_nvhs_5>,
+		       <&p2u_nvhs_6>, <&p2u_nvhs_7>;
+		phy-names = "p2u-0", "p2u-1", "p2u-2", "p2u-3", "p2u-4",
+			    "p2u-5", "p2u-6", "p2u-7";
+	};
 };