ASoC: msm: qdsp6: Fix for EVRC-B/WB vocoder rate

Rate set in userspace for EVRC-B/WB vocoders are not
propagated to DSP. Fix the issue by sending rate command to DSP

Change-Id: I449297404c4a0f826c23dedd2aeebaeef408106b
Signed-off-by: Vidyakumar Athota <vathota@codeaurora.org>
CRs-Fixed: 488084