mem: Remove extraneous acquire/release flags and attributes

mem: Remove extraneous acquire/release flags and attributes

This patch removes the extraneous flags and attributes from the
request and packet, and simply leaves the new commands. The change
introduced when adding acquire/release breaks all compatibility with
existing traces, and there is really no need for any new flags and
attributes. The commands should be sufficient.

This patch fixes packet tracing (urgent), and also removes the
unnecessary complexity.