Add license Kconfig for 3rd party binary blobs?

[Nathan Hartman]

I noticed that we are downloading a 3rd party precompiled library,
libphy62xxble.a from www.phyplusinc.com. (One of the Linux build tests
on PR-6266 failed because curl failed to download it.)

This download is done in arch/arm/src/phy62xx/Make.defs:

if [ ! -f libphy62xxble.a ]; then \
echo "############download lib form server############"; \
curl -L -o libphy62xxble.a http://www.phyplusinc.com/phyplus/libphy62xxble.a; \
cp -a libphy62xxble.a ../../../staging; \
else \
echo "############file exist############"; \
fi \

Should we add a new item to Kconfig -> License Setup?

For example:

[ ] Use components that include 3rd party binary objects

Cheers,
Nathan