mm-video: venc: switch between executing and loaded.

  --when the v4l2 modules stopped, it will free all output
    and input buffers. So when it is re-started again,
    re-do the VIDIOC_REQBUFS command again.

Change-Id: I7c6de237fdd7476ca4ebc7d1f1016e86f3af9d95
2 files changed