msm: camera: Use only one SMMU context bank for 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.

Change-Id: I43316d073c17605ebe3566eb9fcaaba592fc8805
Signed-off-by: Lakshmi Narayana Kalavala <lkalaval@codeaurora.org>