Mastodawn

Following the advice from #postmarketOS maintainers, I submitted my nightlight patch to the LKML.
Once it will be accepted, it will become available for all the phones using close-to-mainline kernels, without having to manually add the patch to every repository.

Upstreaming the code to mainline is the only way of supporting hardware in a sustainable way (from the effort point of view), and everyone benefits of our code.