x86: make hibernation always-possible

This commit:

  aced3cee: x86/Voyager: remove HIBERNATION Kconfig quirk

Made hibernation only available on UP - instead of making it available
on all of x86. Fix it.
Reported-by: NJiri Slaby <jirislaby@gmail.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

arch/x86/Kconfig

@@ -140,7 +140,6 @@ config HAVE_CPUMASK_OF_CPU_MAP
 
 config ARCH_HIBERNATION_POSSIBLE
 	def_bool y
-	depends on !SMP
 
 config ARCH_SUSPEND_POSSIBLE
 	def_bool y