msm: vidc: Add support for runtime input CR

Clients send input buffer Compression Ratio through V4L2
buffer. Driver makes use of it while voting for bus BW.

CRs-Fixed: 2012520
Change-Id: I88da9396e98c2e081d1e16c3b1445b14c0ad4528
Signed-off-by: Praneeth Paladugu <ppaladug@codeaurora.org>