msm: qdsp5v2: Add support for variable rate in MVS driver

Add support for configuring encoder min and max rate
 as per client need.

CRs-Fixed: 367973
Signed-off-by: Vinay Vaka <vvaka@codeaurora.org>
(cherry picked from commit 40ea09e0e1195cb9fbc01ece07fe4746078dd6da)

Change-Id: Iee99e8efe653f0cc3a78b3b31b9236d0227611e2
Signed-off-by: Srivalli Oguri <oguri@codeaurora.org>