Integrate meta-seconorth-distro/ffmpeg-lic

Commit: seco-ne/yocto/layers/meta-seconorth-distro@b6a29be4

ffmpeg: remove 'commercial' flag when non-free parts are disabled

It is not quite clear what parts are covered from the 'commercial' flag, but to me it looks like, that it is related to the 'non-free' parts, enabled with the --non-free compile switch.