ARM: tegra: Enable PCIe controller on Beaver

PCIe lane 0 is connected to an onboard Gigabit Ethernet (RTL8168evl) and
lane 4 is routed to the board's miniPCIe slot.
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>

arch/arm/boot/dts/tegra30-beaver.dts

@@ -10,6 +10,27 @@ memory {
 		reg = <0x80000000 0x7ff00000>;
 	};
 
+	pcie-controller {
+		status = "okay";
+		pex-clk-supply = <&sys_3v3_pexs_reg>;
+		vdd-supply = <&ldo1_reg>;
+		avdd-supply = <&ldo2_reg>;
+
+		pci@1,0 {
+			status = "okay";
+			nvidia,num-lanes = <4>;
+		};
+
+		pci@2,0 {
+			status = "okay";
+			nvidia,num-lanes = <1>;
+		};
+
+		pci@3,0 {
+			nvidia,num-lanes = <1>;
+		};
+	};
+
 	host1x {
 		hdmi {
 			status = "okay";