ARM: kirkwood: Add device-tree for keymile

Import the dts files from Linux 4.17 and enable CONFIG_OF_CONTROL.

Signed-off-by: Chris Packham <judge.packham@gmail.com>
Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/arch/arm/dts/kirkwood-km_common.dtsi b/arch/arm/dts/kirkwood-km_common.dtsi
new file mode 100644
index 0000000..75dc839
--- /dev/null
+++ b/arch/arm/dts/kirkwood-km_common.dtsi
@@ -0,0 +1,47 @@
+// SPDX-License-Identifier: GPL-2.0
+/ {
+	chosen {
+		bootargs = "console=ttyS0,115200n8 earlyprintk";
+		stdout-path = &uart0;
+	};
+
+	ocp@f1000000 {
+		pinctrl: pin-controller@10000 {
+			pinctrl-0 = < &pmx_i2c_gpio_sda &pmx_i2c_gpio_scl >;
+			pinctrl-names = "default";
+
+			pmx_i2c_gpio_sda: pmx-gpio-sda {
+				marvell,pins = "mpp8";
+				marvell,function = "gpio";
+			};
+			pmx_i2c_gpio_scl: pmx-gpio-scl {
+				marvell,pins = "mpp9";
+				marvell,function = "gpio";
+			};
+		};
+
+		serial@12000 {
+			status = "okay";
+		};
+	};
+
+	i2c {
+		compatible = "i2c-gpio";
+		gpios = < &gpio0 8 GPIO_ACTIVE_HIGH		/* sda */
+			  &gpio0 9 GPIO_ACTIVE_HIGH>;		/* scl */
+		i2c-gpio,delay-us = <2>;	/* ~100 kHz */
+	};
+};
+
+&nand {
+	status = "okay";
+	chip-delay = <25>;
+};
+
+&pciec {
+        status = "okay";
+};
+
+&pcie0 {
+	status = "okay";
+};