msm: camera: icp: Validate size read from msg & dbg queues

A common api is used to read both msg and dbg queues. The
hw mgr buffers for these queues are of different sizes.
Hence check to validate the size read for each queue
independently.

Change-Id: I95b5044753d0fafebfb1d6797bc1a131fc68a251
Signed-off-by: Venkat Chinta <vchinta@codeaurora.org> adding