staging: ramster: move to new zcache2 codebase
_HAS_UNUSE.

to apply to 20120905 staging-next, no other changes]
meone is looking for
in staging is a "demo" version, and this is a massive
iminary version of
a patch was posted by Erlangen University and needs to be integrated and
tested for zcache2 and brought up to kernel standards.