ASoC: msm: Add 24 bit support to Primary MI2S TX

Add 24 bit support to Primary MI2S Tx. Add
capability to specify bits per sample to DSP.

Change-Id: I928f37c7b76ffea735365b164d52ceabd88e77e6
Signed-off-by: Damir Didjusto <damird@codeaurora.org>
Signed-off-by: flar2 <asegaert@gmail.com>