makefiles/Makefile.kicad: use variable TOP instead of hard-coding ../../ path
makefiles/Makefile.kicad: use variable TOP instead of hard-coding ../../ path

This allows inclusion also in places that don't follow the <project>/dir/
convention. Note that we still need a single directory under which all Qi
project directories are located.

cfriedt/ben-wpan,cfriedt/ben-wpan,cfriedt/ben-wpan,cfriedt/ben-wpan,cfriedt/ben-wpan,cfriedt/ben-wpan