arm/dt: msm8610: Add support for incall LCH tone playback

Add incall local call hold tone playback device
required for delivering LCH tone to the farside.
A seperate device is required in device tree for
each different voice session/subscription.

Change-Id: I80c662bce110aab59e7f93bd167a67029651602d
Signed-off-by: Vicky Sehrawat <vickys@codeaurora.org>