msm: camera: ope: Reduce OPE BUS memory

Update OPE BUS driver to reduce memory allocation
at boot time. It reduces the consumption of
memory when camera is not active.

CRs-Fixed: 2700579
Change-Id: Ic9a13ee53f6bb140de8e943a017cf996eda5df65
Signed-off-by: Suresh Vankadara <svankada@codeaurora.org>