ARM: kirkwood: Add device-tree for nas220

Import the dts file 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/configs/nas220_defconfig b/configs/nas220_defconfig
index 0299e0a..ddf5689 100644
--- a/configs/nas220_defconfig
+++ b/configs/nas220_defconfig
@@ -3,6 +3,7 @@
 CONFIG_SYS_TEXT_BASE=0x600000
 CONFIG_TARGET_NAS220=y
 CONFIG_IDENT_STRING="\nNAS 220"
+CONFIG_DEFAULT_DEVICE_TREE="kirkwood-blackarmor-nas220"
 CONFIG_BOOTDELAY=3
 # CONFIG_DISPLAY_BOARDINFO is not set
 CONFIG_HUSH_PARSER=y
@@ -24,6 +25,7 @@
 CONFIG_ISO_PARTITION=y
 CONFIG_EFI_PARTITION=y
 # CONFIG_PARTITION_UUIDS is not set
+CONFIG_OF_CONTROL=y
 CONFIG_ENV_IS_IN_NAND=y
 CONFIG_MVSATA_IDE=y
 # CONFIG_MMC is not set
@@ -33,4 +35,3 @@
 CONFIG_USB=y
 CONFIG_USB_EHCI_HCD=y
 CONFIG_USB_STORAGE=y
-CONFIG_OF_LIBFDT=y