arm, am335x: siemens: enable DM/DTS support

enable basic DM/DTS support for the siemens am335x based boards.

Signed-off-by: Heiko Schocher <hs@denx.de>
diff --git a/configs/rut_defconfig b/configs/rut_defconfig
index 14a158f..1d04f76 100644
--- a/configs/rut_defconfig
+++ b/configs/rut_defconfig
@@ -1,5 +1,8 @@
 CONFIG_ARM=y
 CONFIG_TARGET_RUT=y
+CONFIG_SYS_MALLOC_F_LEN=0x2000
+CONFIG_DM_SERIAL=y
+CONFIG_DEFAULT_DEVICE_TREE="am335x-rut"
 CONFIG_SPL=y
 CONFIG_FIT=y
 CONFIG_BOOTDELAY=3
@@ -25,6 +28,9 @@
 CONFIG_CMD_TIME=y
 CONFIG_CMD_EXT2=y
 CONFIG_CMD_FAT=y
+CONFIG_OF_CONTROL=y
+CONFIG_OF_EMBED=y
+CONFIG_DM=y
 CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_WINBOND=y
 CONFIG_SYS_NS16550=y