Cleanup cache_reap().

Note, I did not include the change to remove the '+ smp_processor_id()'
from the schedule_delayed_work() calls.  This may cause rejects, which I,
or any sane person :), can trivially resolve.

mcd@arrakis:~/linux/source/linux-2.6.14+slab_cleanup/patches $ diffstat
cache_reap.patch
 slab.c |   36 +++++++++++++-----------------------
 1 files changed, 13 insertions(+), 23 deletions(-)

-Matt