ASoc: msm: Add 24-bit playback support for MSM8226

Add support for 24-bit playback in MSM8226 machine
driver. This change enables playback of PCM data whose
sample size is 24 bits.

Change-Id: I63966b291978b2816038a37c076626ad57b49ffe
Signed-off-by: Venkat Sudhir <vsudhir@codeaurora.org>