common interface: replace arguements size_t to uint32_t

common interface: replace arguements size_t to uint32_t

We prefer to build up a tiny compact engine at memory rather than compatibility,
this engine is not considerd for end-users but designed for middle-level framework
and some low-level users.

Thus, we won't consider 64bits data size,
use explicit 32 bits data until coming next upgrade...

Change-Id: I0704d5f1e0eb909cccc10922bc5972e115fbbcc0