msm: camera: cci: Fix some cci stability issues

This change moves the set parameter under lock
context to make sure all the cmds are atomic.
This change also move the unlock at the end
of writing data, then we don't need to get
inflight word count and write back to execute
word count to fix underflow issue.

CRs-Fixed: 3497876
Change-Id: I1c16a204e41e6af22a23e9249c82f541e7e6e21a
Signed-off-by: Depeng Shao <quic_depengs@quicinc.com>