arm/dt: msm8x16: add Listen support in device tree

Listen feature in Audio is used for MIC activity
detection. This feature is used by client applications
to detect sound model and keywords from user. This change
enables Listen feature in MSM8x16 device tree

Change-Id: I3c6f0c211909222c50aedd532f9be9025f80e29a
Signed-off-by: Yamit Mehta <ymehta@codeaurora.org>