msm: camera: icp: Add packet validation

Check number of command buffers and IO config buffers
before processing a packet to avoid invalid accessing
buffers.

Change-Id: Idc663c47841270e5b163813ec1d423fd8705e1e5
Signed-off-by: Suresh Vankadara <svankada@codeaurora.org>
Signed-off-by: Abhilash Kumar <krabhi@codeaurora.org>