ARM: imx: Enable dts for i.MX6SX-SDB

Enable DTS and OF_CONTROL for i.MX6SX-SDB.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Fabio Estevam <fabio.estevam@nxp.com>

configs/mx6sxsabresd_defconfig

@@ -3,6 +3,7 @@ CONFIG_ARCH_MX6=y
 CONFIG_TARGET_MX6SXSABRESD=y
 # CONFIG_CMD_BMODE is not set
 CONFIG_NXP_BOARD_REVISION=y
+CONFIG_DEFAULT_DEVICE_TREE="imx6sx-sdb"
 CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=board/freescale/mx6sxsabresd/imximage.cfg"
 # CONFIG_CONSOLE_MUX is not set
 CONFIG_SYS_CONSOLE_IS_IN_ENV=y
@@ -27,6 +28,7 @@ CONFIG_CMD_EXT4=y
 CONFIG_CMD_EXT4_WRITE=y
 CONFIG_CMD_FAT=y
 CONFIG_CMD_FS_GENERIC=y
+CONFIG_OF_CONTROL=y
 CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_BAR=y
 CONFIG_PHYLIB=y
@@ -36,4 +38,3 @@ CONFIG_USB_STORAGE=y
 CONFIG_USB_HOST_ETHER=y
 CONFIG_USB_ETHER_ASIX=y
 CONFIG_VIDEO=y
-CONFIG_OF_LIBFDT=y

configs/mx6sxsabresd_spl_defconfig

@@ -10,6 +10,7 @@ CONFIG_SPL_LIBDISK_SUPPORT=y
 CONFIG_SPL_WATCHDOG_SUPPORT=y
 # CONFIG_CMD_BMODE is not set
 CONFIG_NXP_BOARD_REVISION=y
+CONFIG_DEFAULT_DEVICE_TREE="imx6sx-sdb"
 CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=arch/arm/mach-imx/spl_sd.cfg"
 # CONFIG_CONSOLE_MUX is not set
 CONFIG_SYS_CONSOLE_IS_IN_ENV=y
@@ -36,6 +37,7 @@ CONFIG_CMD_EXT4=y
 CONFIG_CMD_EXT4_WRITE=y
 CONFIG_CMD_FAT=y
 CONFIG_CMD_FS_GENERIC=y
+CONFIG_OF_CONTROL=y
 CONFIG_SPI_FLASH=y
 CONFIG_PHYLIB=y
 CONFIG_PCI=y
@@ -44,4 +46,3 @@ CONFIG_USB_STORAGE=y
 CONFIG_USB_HOST_ETHER=y
 CONFIG_USB_ETHER_ASIX=y
 CONFIG_VIDEO=y
-CONFIG_OF_LIBFDT=y