README: move copyright related information into a single spot Some build system may want to cite or extract license information from a project's sources. Referencing two separate spots within the same file may not be possible. Move the "Copyright and license" section to the top of the file, such that an adjacent block of lines spans all related information. This is very desirable for bitbake recipes in a poky layer.
Use standard autotools setup. Use a standard autotools build system instead of hand-crafted Makefiles. This makes sigrok-firmware consistent with the other sigrok subprojects, makes it more portable, and gives us all the usual autotools mechanism for free (make install, uninstall, dist, --prefix, and so on).