ASoC: msm8x10: Add support for QCHAT voice session

This change is needed to support exclusive voice session
for QCHAT on msm8x10.

Change-Id: I92b8e81b814cbfc3cd99d6aa38df6c319e0b4e33
Signed-off-by: Narsinga Rao Chella <nrchella@codeaurora.org>