v4.19.13 snapshot.
diff --git a/lib/fdt_rw.c b/lib/fdt_rw.c
new file mode 100644
index 0000000..0c1f0f4
--- /dev/null
+++ b/lib/fdt_rw.c
@@ -0,0 +1,2 @@
+#include <linux/libfdt_env.h>
+#include "../scripts/dtc/libfdt/fdt_rw.c"