ASoC: msm: qdsp6v2: Add stream based API for dolby decoder parameters

In gapless mode volume of the dd/ddp clip becomes low after first
playback. Dolby decoder parameters are send to DSP only for the
first stream. Add stream based api for dolby decoder parameters and
use the appropriate stream before sending the paramters to DSP.

Change-Id: I189b14b550e3471d53971af5a453db2a6a978b72
Signed-off-by: Krishnankutty Kolathappilly <kkolat@codeaurora.org>