PM: Fix dependencies of CONFIG_SUSPEND and CONFIG_HIBERNATION

PM: Fix dependencies of CONFIG_SUSPEND and CONFIG_HIBERNATION

Dependencies of CONFIG_SUSPEND and CONFIG_HIBERNATION introduced by commit
508e3419fec196f02fe94f5a2b0be57bf5054268 "Introduce CONFIG_SUSPEND for
suspend-to-Ram and standby" are incorrect, as they don't cover the facts that
(1) not all architectures support suspend and (2) SMP hibernation is only
possible on X86 and PPC64 (if CONFIG_PPC64_SWSUSP is set).

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>