Use linuxfb instead of eglfs with streaming_client

[Binogure]

Hey,

I'm using a Raspberry PI 4, and since OSMC is not compatible yet wit hRPI 4 I installed a LibreElec. However this distro doesn't have any X11, but linuxfb works pretty well.

Starting the steamlink client using linuxfb as display for QT works like a charm, however I cannot switch the display driver to use for the streaming_client binary.

I know it requires X11 to work correctly, but I'm wondering, for testing purpose, do you mind sharing any intel to use linuxFB instead of eglfs.

Thank you