libfdt: migrate fdt_wip.c to a wrapper of scripts/dtc/libfdt/fdt_wip.c

Now, lib/libfdt/fdt_wip.c is the same as scripts/dtc/libfdt/fdt_wip.c

Change the former to a wrapper of the latter.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/tools/libfdt/fdt_wip.c b/tools/libfdt/fdt_wip.c
new file mode 100644
index 0000000..bad73ed
--- /dev/null
+++ b/tools/libfdt/fdt_wip.c
@@ -0,0 +1,2 @@
+#include "fdt_host.h"
+#include "../scripts/dtc/libfdt/fdt_wip.c"