fdtdec: fix OF_CONTROL switch

There is no case where defined(SPL_DISABLE_OF_CONTROL) is true.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/include/fdtdec.h b/include/fdtdec.h
index 62acbd0..2ef3f66 100644
--- a/include/fdtdec.h
+++ b/include/fdtdec.h
@@ -46,7 +46,7 @@
 #endif
 
 #ifdef CONFIG_OF_CONTROL
-# if defined(CONFIG_SPL_BUILD) && defined(SPL_DISABLE_OF_CONTROL)
+# if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_DISABLE_OF_CONTROL)
 #  define OF_CONTROL 0
 # else
 #  define OF_CONTROL 1