While I respect the position of the FSF and other individuals on the
political position of software freedom I'd advise you to concentrate on the
engineering aspect with any submission to lkml/Linus. There are certainly
hackers sympathetic to reducing proprietary taint in the kernel, however the
kernel in itself is very much not a political vehicle.
The best you can hope for is reducing the diff between the Linus tree and
your -libre branch. I doubt the Linus tree will ever fully align with the
political goal you are aiming for.