msm: camera: Add plane's data offset in address calculation.

When a frame is diverted for postprocessing, and returned
back to kernel, the address of plane 0 is used to find
the buffer in the queue. Use the data offset field of
plane 0 in the address calculation, otherwise we will
not be able to find the buffer.

Change-Id: I91b1c61e4fe04a44f5d76457ab91aaba3e815ad3
CRs-Fixed: 324846, 323332
Signed-off-by: Kiran Kumar H N <hurlisal@codeaurora.org>