ASoC: msm: Add fix for Unsupported Proxy backend sample rates.

- AFE does not support sampling rate 44.1k and multi-channel.
- This fix addresses the issue by setting backend proxy device
  sampling rate to 48k and channel count to 2.

CRs-Fixed: 412542
Change-Id: I8565418c24a8bfd4c650148cec4fd1a1412a4830
Signed-off-by: Dhananjay Kumar <dhakumar@codeaurora.org>