msm: camera: raw snapshot kernel fix for vfe40

--configure AXI  for raw snapshot correctly
only one channel for the RAW snapshot.
--configure BUS command according to HW team
--update VFE_CGC_OVERRIDE  for vfe40

Change-Id: I2b38ef51e7bb6b2a9e8ae17f7d4a34c9a632bcbf
Signed-off-by: Peter Liu <pingchie@codeaurora.org>