arm64: dts: clearfog-gt-8k: add PCIe slot description

This adds support for the PCIe interface on the CON4 mini-PCIe
connector.

Signed-off-by: Baruch Siach <[email protected]>
Signed-off-by: Gregory CLEMENT <[email protected]>

arch/arm64/boot/dts/marvell/armada-8040-clearfog-gt-8k.dts

@@ -233,6 +233,13 @@
 	};
 };
 
+&cp0_pcie0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&cp0_pci0_reset_pins>;
+	reset-gpios = <&cp0_gpio2 0 GPIO_ACTIVE_LOW>;
+	status = "okay";
+};
+
 &cp0_gpio2 {
 	sata_reset {
 		gpio-hog;