ARM: dts: imx6qdl-hummingboard: Add PCIe support

Add PCIe support. Based on a patch from Rabeeh Khoury from the solid-run
tree.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

arch/arm/boot/dts/imx6qdl-hummingboard.dtsi

@@ -192,6 +192,12 @@ MX6QDL_PAD_KEY_ROW3__I2C2_SDA 0x4001b8b1
 			>;
 		};
 
+		pinctrl_hummingboard_pcie_reset: hummingboard-pcie-reset {
+			fsl,pins = <
+				MX6QDL_PAD_EIM_DA4__GPIO3_IO04 0x1b0b1
+			>;
+		};
+
 		pinctrl_hummingboard_pwm1: pwm1grp {
 			fsl,pins = <MX6QDL_PAD_DISP0_DAT8__PWM1_OUT 0x1b0b1>;
 		};
@@ -245,6 +251,13 @@ MX6QDL_PAD_SD2_DAT3__SD2_DATA3 0x13059
 	};
 };
 
+&pcie {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_hummingboard_pcie_reset>;
+	reset-gpio = <&gpio3 4 0>;
+	status = "okay";
+};
+
 &pwm1 {
 	 pinctrl-names = "default";
 	 pinctrl-0 = <&pinctrl_hummingboard_pwm1>;