zcache/TODO: Update on two items.

Two of them (zcache DebugFS cleanup) and the module loading
capability are now in linux-next for v3.10.

Also Bob Liu is full-time going to help on knocking these items
off the list.

CC: bob.liu@oracle.com
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>