update vlc,ffmpeg PREFERRED_PROVIDER

[EasyIP2023]

- What I did

Switch to defaulting to OE core ffmpeg & meta-openembedded vlc.

- Reason

Upgrades to newer rpi-distro VLC version in an OE environment have proven to be tedious due to all the PI foundation patches.

Some patches aren't fully pushed into github and require updates to build.

Maintaining patches have also proven to be unstable.

Default to stable builds of both so that peoples builds aren't broken.

If rpi-distro version of ffmpeg & vlc wanted users may switch by setting PREFFERED_PROVIDER.

- How I did it

@kraj @agherzan .

What do you guys think?

[EasyIP2023]

@kraj Any status

[agherzan]

@kraj what do you mean by docs? Git log or readthedocs? If the latter, I think the commit already adds information about that.

[kraj]

@kraj what do you mean by docs? Git log or readthedocs? If the latter, I think the commit already adds information about that.

the same .md file in the PR, which mentions about preferred providers.

[agherzan]

@kraj Could you have an in-line text proposal? Just to make sure we are aligned on what you propose here.

[kraj]

@kraj Could you have an in-line text proposal? Just to make sure we are aligned on what you propose here.

Yeah will send separately merge this one