verbosity of MMU_Cache is always 0 about piccolo

[rsnikhil]

Yes, you are correct, but I'm leaving it as it is.

One typically wants to selectively fix verbosity on one of many
possible modules, briefly while debugging it, and rather than
designing some dynamic mechanism for such fine-grain (per module)
control of verbosity, I find it's easy enough just to temporarily edit
the verbosity declaration in the module of interest and recompile it,
and restore it when done.