ARM: dts: imx6*-hummingboard2: fix PCIe reset polarity

The driver always uses active-low, but better describe reality in the DT.
Signed-off-by: NLucas Stach <dev@lynxeye.de>
Signed-off-by: NRussell King <rmk+kernel@armlinux.org.uk>
Reviewed-by: NFabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: NShawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx6qdl-hummingboard2.dtsi

@@ -469,7 +469,7 @@
 &pcie {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_hummingboard2_pcie_reset>;
-	reset-gpio = <&gpio2 11 0>;
+	reset-gpio = <&gpio2 11 GPIO_ACTIVE_LOW>;
 	status = "okay";
 };