msm: camera2: Enhance cpp driver to support native buffers

The cpp driver can be used in pure offline mode. In this case
the input and output buffers are native buffer and not from
vb2 queue. This change enhances cpp driver to be configured
to use native buffers for input and output.

Change-Id: I835296b56a406be73c2b3a0f71c75e748ff04473
Signed-off-by: Rajakumar Govindaram <rajakuma@codeaurora.org>