msm: 9615: Add DTMF platform data

Add support to generate DTMF using DSP's audio
front-end(AFE). Add DTMF platform data to support
DTMF in ASOC.

Change-Id: Iebc095c2bcb71467d71fc92f04c3dfb0c068ef60
Signed-off-by: Shiv Maliyappanahalli <smaliyap@codeaurora.org>
3 files changed