msm: camera: Support for secure context bank in vfe

VFE is currently using two context Banks in the VFE
SMMU. However, one CB is sufficient. Reconfigure the
CB configuration to free up 1 CB and add support
for secure context bank in VFE

Change-Id: I1e0379de2cc4091a9a7478a845b5bb25c39d7516
Signed-off-by: Lakshmi Narayana Kalavala <lkalaval@codeaurora.org>