[TESTING] Linux 4.9 kernel and improved video stack for Vero 4K / 4K +

Testing
1611

regarding the choppy playback: have a look if the file /dev/tee0 exists. If not then do the following:

systemctl stop mediacenter
sudo touch /dev/tee0
sudo chmod 666 /dev/tee0
systemctl start mediacenter

after the test just do

sudo rm /dev/tee0