ARM: mxs: always build in device tree support

As the ultimate for mxs platform is to convert over to device tree,
let's start always building in device tree support for the platform.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Marek Vasut <marex@denx.de>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index ae5c251..1f1a4fa 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -471,6 +471,7 @@
 	select COMMON_CLK
 	select HAVE_CLK_PREPARE
 	select PINCTRL
+	select USE_OF
 	help
 	  Support for Freescale MXS-based family of processors
 
diff --git a/arch/arm/configs/mxs_defconfig b/arch/arm/configs/mxs_defconfig
index 1ebbf45..5406c23 100644
--- a/arch/arm/configs/mxs_defconfig
+++ b/arch/arm/configs/mxs_defconfig
@@ -22,6 +22,7 @@
 # CONFIG_IOSCHED_DEADLINE is not set
 # CONFIG_IOSCHED_CFQ is not set
 CONFIG_ARCH_MXS=y
+CONFIG_MACH_MXS_DT=y
 CONFIG_MACH_MX23EVK=y
 CONFIG_MACH_MX28EVK=y
 CONFIG_MACH_STMP378X_DEVB=y
diff --git a/arch/arm/mach-mxs/Kconfig b/arch/arm/mach-mxs/Kconfig
index 8138a13..91cf062 100644
--- a/arch/arm/mach-mxs/Kconfig
+++ b/arch/arm/mach-mxs/Kconfig
@@ -25,7 +25,6 @@
 	bool "Support MXS platforms from device tree"
 	select SOC_IMX23
 	select SOC_IMX28
-	select USE_OF
 	help
 	  Include support for Freescale MXS platforms(i.MX23 and i.MX28)
 	  using the device tree for discovery