ofnode: fdt_support definitions needed if OF_CONTROL is enabled

With the use of CONFIG_IS_ENABLED in code, instead of at the preprocessor
level, these defines are still needed if OF_CONTROL is enabled.

Signed-off-by: Troy Kisky <troykiskyboundary@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/include/fdt_support.h b/include/fdt_support.h
index 5638bd4..eeb83e6 100644
--- a/include/fdt_support.h
+++ b/include/fdt_support.h
@@ -7,7 +7,8 @@
 #ifndef __FDT_SUPPORT_H
 #define __FDT_SUPPORT_H
 
-#if defined(CONFIG_OF_LIBFDT) && !defined(USE_HOSTCC)
+#if (defined(CONFIG_OF_LIBFDT) || defined(CONFIG_OF_CONTROL)) && \
+	!defined(USE_HOSTCC)
 
 #include <asm/u-boot.h>
 #include <linux/libfdt.h>