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.

b/11051201
Signed-off: Kim Zhang<xiazhang@codeaurora.org>
Change-Id: I7c6de237fdd7476ca4ebc7d1f1016e86f3af9d95
2 files changed