[][Add tool to support embed dm-verity bootargs into fdt]

[Description]
Add tool to support embed dm-verity bootargs into fdt

[Release-log]
N/A

Change-Id: I65ef262484ecc48efc513b0ef1a0cb96e5440011
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/5850557
diff --git a/tools/fdt-patch-dm-verify/src/libfdt/Makefile.libfdt b/tools/fdt-patch-dm-verify/src/libfdt/Makefile.libfdt
new file mode 100644
index 0000000..26e12f6
--- /dev/null
+++ b/tools/fdt-patch-dm-verify/src/libfdt/Makefile.libfdt
@@ -0,0 +1,18 @@
+# SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause)
+# Makefile.libfdt
+#
+# This is not a complete Makefile of itself.  Instead, it is designed to
+# be easily embeddable into other systems of Makefiles.
+#
+LIBFDT_soname = libfdt.$(SHAREDLIB_EXT).1
+LIBFDT_INCLUDES = fdt.h libfdt.h libfdt_env.h
+LIBFDT_VERSION = version.lds
+LIBFDT_SRCS = fdt.c fdt_ro.c fdt_wip.c fdt_sw.c fdt_rw.c fdt_strerror.c fdt_empty_tree.c \
+	fdt_addresses.c fdt_overlay.c
+LIBFDT_OBJS = $(LIBFDT_SRCS:%.c=%.o)
+LIBFDT_LIB = libfdt-$(DTC_VERSION).$(SHAREDLIB_EXT)
+
+# libfdt_clean:
+#	@$(VECHO) CLEAN "(libfdt)"
+#	rm -f $(STD_CLEANFILES:%=$(LIBFDT_dir)/%)
+#	rm -f $(LIBFDT_dir)/$(LIBFDT_soname)