ASoC: msm: Mixer control to update the sample rate of SEC I2S interface

Updating the sample rate for the compressed stream playback of the I2S
interface. For PCM playback DSP supports 32 & 48KHz only, so fixing the
sample rate to 48KHz.

CRs-Fixed: 401928
Change-Id: I7c67daa526a9d25c4185c4a8a1aca3c9862abadb
Signed-off-by: Aviral Gupta <aviralg@codeaurora.org>