msm: ais: fix camif_cfg programming

Fixed Camera configuration register. Register expects width and height
starting from 0 while it was programmed starting from 1.

This fixes CAMIF erorrs we experience as the programmed size is
always 1 more pixel and line.

Change-Id: I73f1f5040820b71d317c317f8f5c6e3ff19db6e6
Signed-off-by: E V Ravi <evenka@codeaurora.org>