msm: camera: Fix direction in dma buf ops

The current direction passed to begin/end_cpu_access
dma_buf ops is incorrect. This change will fix the
direction so that the correct cache maintenance can be
performed by dma_buf ops.

Change-Id: Iff2ad22916a3ede1a0eed410955a2e893019d51e
Signed-off-by: Jigarkumar Zala <jzala@codeaurora.org>