ASoC: mdm9615: Add DTMF TX FE to the machine driver
ASoC: mdm9615: Add DTMF TX FE to the machine driver

Add support to detect DTMF tones in voice call's RX
path using DSP. Update the machine driver to add
DTMF TX FE.

Change-Id: Ic6ff8b5ae2dc77160b5d2128d34bef1c241393cc
Signed-off-by: Shiv Maliyappanahalli <ac787d8f09a6823214d7ee5f9172cecd4adaf7cb@codeaurora.org>

TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas