This adds support for the devkit camera. It also removes unneeded v4l code brought over from NXPs tree since it will make it much simpler for me to forward it to 5.x this way.
To test use e.g.
gst-launch-1.0 v4l2src ! video/x-raw,width=640,height=480 ! videoconvert ! xvimagesink -v
after connecting to the devkit via