msm: camera: isp: Add Bus alignment to width

Bus Client width always needs to be aligned to 16 bytes. Add
this missing alignment. Without it, for unaligned dimensions
there is no buf done.

Change-Id: I4107d9d77da418b5fd71e6c5ff530404517c13dd
Signed-off-by: Harsh Shah <harshs@codeaurora.org>