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/board/gdsys/405ex/405ex.h

@@ -0,0 +1,10 @@
+#ifndef __405EX_H_
+#define __405EX_H_
+
+/* functions to be provided by board implementation */
+void gd405ex_init(void);
+void gd405ex_set_fpga_reset(unsigned state);
+void gd405ex_setup_hw(void);
+int gd405ex_get_fpga_done(unsigned fpga);
+
+#endif /* __405EX_H_ */