[PATCH] rpaphp_pci build fix

(akpm: _machine is some ppc64 thing - this is a powerpc-only driver)

Signed-off-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>