ARM: dts: imx6sx-softing-vining-2000: Enable PCI support

Add PCI support.

Since this board has an active high PCI reset line, pass the
'reset-gpio-active-high' property.
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Reviewed-by: Marek Vasut <marex@denx.de>
Tested-by: Marek Vasut <marex@denx.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx6sx-softing-vining-2000.dts

@@ -352,6 +352,12 @@ MX6SX_PAD_NAND_CLE__I2C3_SCL		0x4001b8b1
 		>;
 	};
 
+	pinctrl_pcie: pciegrp {
+		fsl,pins = <
+			MX6SX_PAD_NAND_DATA02__GPIO4_IO_6	0x10b0
+		>;
+	};
+
 	pinctrl_pwm1: pwm1grp-1 {
 		fsl,pins = <
 			/* blue LED */
@@ -490,6 +496,14 @@ MX6SX_PAD_SD4_DATA7__USDHC4_DATA7	0x170f9
 	};
 };
 
+&pcie {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_pcie>;
+	reset-gpio = <&gpio4 6 GPIO_ACTIVE_HIGH>;
+	reset-gpio-active-high;
+	status = "okay";
+};
+
 &pwm1 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_pwm1>;