Never enable v4l2 buffer copies

If upstream element doesn't specify minimum amount of buffers in the
allocation query, e.g. 'tee', v4l2src enables buffer copying. Copying
of frames is super duper slow, way worse than pipelin stalls from too
few buffers. Never enable it.

Change-Id: Idda3598595ccbe38e3daa635789316f42cfa32e2
1 file changed