msm: camera: icp: Send cmd buffer memory region to FW

As part of enabling cache on A5, we need to send the start
address and length of the cmd buffer region allocated
by userspace from shared memory.

Change-Id: I3d91c4d6dd7a38e34dfd9868123a51b904609f81
Signed-off-by: Karthik Anantha Ram <kartanan@codeaurora.org>