libs: humongous code style fix

libs: humongous code style fix

As part of the upstreaming process of gstreamer-vaapi into the GStreamer
umbrella, we need to comply with the project's code style. This meant to
change a lot of code.

It was decided to use a single massive patch to update the code style.

I would like to apologize with the original developers of this code because of
the history breakage.

Signed-off-by: Víctor Manuel Jáquez Leal <victorx.jaquez@intel.com>