ARM: kirkwood: add db-88f6281-bp board

This is Marvell's Kirkwood development board. It has the following
features

 - 512M DDR2
 - 2 PCI connectors
 - 1 x1 PCI-e interface
 - 1 Gigabit Ethernet Port
 - 2 SATA Ports
 - USB 2.0 Interface
 - SDIO
 - 128M NAND Flash
 - 16M SPI Flash

It can be strapped to boot from SPI or NAND so there are two defconfigs
(one per boot media).

Signed-off-by: Chris Packham <judge.packham@gmail.com>
Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/arch/arm/dts/kirkwood-db-88f6281-spi.dts b/arch/arm/dts/kirkwood-db-88f6281-spi.dts
new file mode 100644
index 0000000..50b1b0d
--- /dev/null
+++ b/arch/arm/dts/kirkwood-db-88f6281-spi.dts
@@ -0,0 +1,48 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Marvell DB-88F6281-BP Development Board Setup
+ *
+ * Saeed Bishara <saeed@marvell.com>
+ * Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+ *
+ */
+
+/dts-v1/;
+
+#include "kirkwood-db-88f6281.dts"
+
+/ {
+	aliases {
+		spi0 = &spi0;
+	};
+};
+
+&spi0 {
+	status = "okay";
+
+	flash@0 {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "st,m25p128", "jedec,spi-nor", "spi-flash";
+		reg = <0>;
+		spi-max-frequency = <50000000>;
+		mode = <0>;
+
+		partition@u-boot {
+			reg = <0x00000000 0x00c00000>;
+			label = "u-boot";
+		};
+		partition@u-boot-env {
+			reg = <0x00c00000 0x00040000>;
+			label = "u-boot-env";
+		};
+		partition@unused {
+			reg = <0x00100000 0x00f00000>;
+			label = "unused";
+		};
+	};
+};
+
+&nand {
+	status = "disabled";
+};