When I reworked the m82xx init functions, I inadvertantly broke the callout
we had from ppc_md.setup_arch() that boards can use to poke & prod things,
once mappings are set.  The following adds in a callback and updates the
one m82xx board that needs it.
Signed-off-by: Tom Rini <trini@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>