ASoC: msm: q6dspv2: add pause/resume support for audio record

Add support for pause/resume functionality for audio capture
path. When application calls stop()for for pausing, suspend
the ASM stream, so that hardware resources can be released.
Again when resuming capture streams with prepare()->start(),
ASM open and the routing call should not be called again.

CRs-fixed: 692084
Change-Id: I59e014696ab0a8c473b87361ac9b739adf538d32
Signed-off-by: Banajit Goswami <bgoswami@codeaurora.org>