avionic design with actual uboot and tooling

submodule of avionic design uboot bootloader and with included tools to
get you started , read readme.md and readme-tk1-loader.md

u-boot/fs/jffs2/Makefile

@@ -0,0 +1,14 @@
+#
+# (C) Copyright 2000-2006
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-$(CONFIG_JFFS2_LZO) += compr_lzo.o
+obj-y += compr_rtime.o
+obj-y += compr_rubin.o
+obj-y += compr_zlib.o
+obj-y += jffs2_1pass.o
+obj-$(CONFIG_SYS_JFFS2_SORT_FRAGMENTS) += mergesort.o
+obj-y += mini_inflate.o