Patch provides a generic hotplug cpu implementation, with the only current
user being pmac.  This doesn't replace real hotplug code as is currently
used by LPAR systems.  Ben i can add the additional pmac specific code to
put the processor into a sleeping state seperately.  Thanks to Nathan for
testing.
Signed-off-by: Zwane Mwaikambo <zwane@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>