asoc: msm: Add support for 32 ch

PCM streams do now support up to 32 channels.
Extend Playback Channel Map mixer control to 32
channels. Use new DSP 32 channel API if DSP version
supports it. If not fall back to 8 channels API.

Change-Id: I74c4f91b0c9fab2a963690ba8143ebea36ad23dd
Signed-off-by: Dieter Luecking <dieterl@codeaurora.org>
Signed-off-by: Mangesh Kunchamwar <mangeshk@codeaurora.org>