msm8952: set recording format to 16 bit

Recording at 24 bit format is not supported, so if
recording is done after the playback of 24 bit format
clip, the recording params are also getting updated
at 24 bit and thus the recording data is improper.

Change-Id: I45ef0188eda2597caa0e2e7cf29fa4d0e21027c2
Signed-off-by: Simmi Pateriya <simmip@codeaurora.org>