msm: camera: fd: Map buffers to device, cpu only if required

While handling input, output buffers not all buffers are
required to be mapped to both device, cpu. Map only if
this particular buffer need to be accessed by device, cpu.

Change-Id: I3e61f171592dfd130717c5f338fc1e1503bb2f2e
Signed-off-by: Pavan Kumar Chilamkurthi <pchilamk@codeaurora.org>