msm: vidc: Adds support to send new command

- Adds supports to send DECODER command to
decoder which inturn used to CLOSE the instance.
- Adds supports to send ENCODER command to
encoder which inturn used to CLOSE the instance.

Change-Id: Ia6037fdf66824538124f775442150b7a4ed201b8
Signed-off-by: Praneeth Paladugu <ppaladug@codeaurora.org>