ARM: dts: imx6qp-sabreauto: enable pcie

Add the reset-gpio property, and enable PCIe on iMX6QP SABREAUTO board.
Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx6qp-sabreauto.dts

@@ -47,7 +47,8 @@ MX6QDL_PAD_GPIO_6__ENET_IRQ		0x000b1
 };
 
 &pcie {
-	status = "disabled";
+	reset-gpio = <&max7310_c 5 GPIO_ACTIVE_LOW>;
+	status = "okay";
 };
 
 &sata {