ARM: kirkwood: Add device-tree for ds109

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/configs/ds109_defconfig b/configs/ds109_defconfig
index 43e92d7..c920743 100644
--- a/configs/ds109_defconfig
+++ b/configs/ds109_defconfig
@@ -2,6 +2,7 @@
 CONFIG_KIRKWOOD=y
 CONFIG_SYS_TEXT_BASE=0x600000
 CONFIG_TARGET_DS109=y
+CONFIG_DEFAULT_DEVICE_TREE="kirkwood-ds109"
 CONFIG_HUSH_PARSER=y
 # CONFIG_CMD_FLASH is not set
 CONFIG_CMD_IDE=y
@@ -14,6 +15,7 @@
 CONFIG_CMD_DATE=y
 CONFIG_CMD_FAT=y
 CONFIG_ISO_PARTITION=y
+CONFIG_OF_CONTROL=y
 CONFIG_ENV_IS_IN_SPI_FLASH=y
 CONFIG_MVSATA_IDE=y
 # CONFIG_MMC is not set