ARM: UniPhier: enable Device Tree control

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index b9ac59e..0982117 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -793,6 +793,7 @@
 	bool "Panasonic UniPhier platform"
 	select CPU_V7
 	select SUPPORT_SPL
+	select OF_CONTROL if !SPL_BUILD
 
 endchoice