[Tizen] Support Video Capture on Geek

When we want to get video capture from camera, the video driver on Geek
demands /dev/video0 and /dev/video2 must be opened simultaneously. We
can get data from video0 when both of them are ready. Otherwise, the video0
will be blocked. So this patch will get data from video0's buffer, meanwhile
video2 must run for nothing.