Patch from Matthew Dobson <colpatch@us.ibm.com>

When I originally wrote the patches implementing the in-kernel topology
macros, they were meant to be called as a second layer of functions,
sans underbars.  This additional layer was deemed unnecessary and
summarily dropped.  As such, carrying around (and typing!) all these
extra underbars is quite pointless.  Here's a patch to nip this in the
(sorta) bud.  The macros only appear in 16 files so far, most of them
being the definitions themselves.