Prepapre for new board revision

Change-Id: I475d6f1f2617ab6aa783e80cdef909c0c633429d
diff --git a/board/czechlight/clearfog/sdn-roadm-add-drop-clearfog.dts b/board/czechlight/clearfog/sdn-roadm-add-drop-clearfog.dts
index 39f5e7a..0ff2fa6 100644
--- a/board/czechlight/clearfog/sdn-roadm-add-drop-clearfog.dts
+++ b/board/czechlight/clearfog/sdn-roadm-add-drop-clearfog.dts
@@ -1 +1,2 @@
+#define CLEARFOG_REV1
 #include "sdn-roadm-clearfog.dtsi"