Revert "Fix SMP poweroff hangs"

This reverts the following changeset in 2.6.22.10 that caused a lot of
reported problems.

	From: Mark Lord <lkml@rtr.ca>

	commit 4047727e from upstream

	We need to disable all CPUs other than the boot CPU (usually 0) before
	attempting to power-off modern SMP machines.  This fixes the
	hang-on-poweroff issue on my MythTV SMP box, and also on Thomas Gleixner's
	new toybox.

	Signed-off-by: Mark Lord <mlord@pobox.com>
	Acked-by: Thomas Gleixner <tglx@linutronix.de>
	Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
	Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
	Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
	Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

There still is a remaining shutdown problem in 2.6.22 with old APM based
systems, but this fix is not the correct one

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>