ASoC: msm: qdsp6v2: Add support for DS2 Dolby Audio Processing

Add support for Dolby DS2 driver for Dolby audio processing.Dolby
ds2 driver uses ioctl interface to transfer parameters to and from
userspace. The parameters are send on active DAP instance on DSP.
The driver supports set parameter, get parameter and get visualizer
interface.

Change-Id: Ica88bde6c5484eb147a48c561eea821e026c03bc
Signed-off-by: Krishnankutty Kolathappilly <kkolat@codeaurora.org>