ASoC: msm: Disable dolby init for Low latency playback

When playing a low latency playback like touch tones, we need not
init dolby post proc on that port. It causes some ds1 specific
getparam calls to go through to dsp and eventually timeout errors

CRs-Fixed: 489919
Change-Id: I5da6e3a1236f1fc8514b372724c68a02349f6d3a
Signed-off-by: Jitendra Singh Naruka <jnaruk@codeaurora.org>