arm: dts: imx7d-sdb add basic dts

Add basic dts for i.MX7D-SDB board.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Cc: Stefano Babic <sbabic@denx.de>
diff --git a/configs/mx7dsabresd_defconfig b/configs/mx7dsabresd_defconfig
index 0701e1d..9fe7c97 100644
--- a/configs/mx7dsabresd_defconfig
+++ b/configs/mx7dsabresd_defconfig
@@ -6,6 +6,7 @@
 CONFIG_IMX_BOOTAUX=y
 # CONFIG_CMD_BMODE is not set
 CONFIG_VIDEO=y
+CONFIG_DEFAULT_DEVICE_TREE="imx7d-sdb"
 CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=board/freescale/mx7dsabresd/imximage.cfg"
 CONFIG_BOOTDELAY=3
 # CONFIG_CONSOLE_MUX is not set
@@ -34,6 +35,7 @@
 CONFIG_CMD_EXT4=y
 CONFIG_CMD_EXT4_WRITE=y
 CONFIG_CMD_FAT=y
+CONFIG_OF_CONTROL=y
 CONFIG_DFU_MMC=y
 CONFIG_DFU_RAM=y
 CONFIG_USB=y
@@ -46,4 +48,3 @@
 CONFIG_G_DNL_MANUFACTURER="FSL"
 CONFIG_G_DNL_VENDOR_NUM=0x0525
 CONFIG_G_DNL_PRODUCT_NUM=0xa4a5
-CONFIG_OF_LIBFDT=y