Suspend: Clean up Kconfig (V2)

This cleans up the suspend Kconfig and removes the need to
declare centrally which architectures support suspend. All
architectures that currently support suspend are modified
accordingly.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Acked-by: Russell King <rmk@arm.linux.org.uk>
Acked-by: Paul Mackerras <paulus@samba.org>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Acked-by: Paul Mundt <lethal@linux-sh.org>
Cc: Pavel Machek <pavel@suse.cz>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig
index fc7ca86..4802eb7 100644
--- a/arch/blackfin/Kconfig
+++ b/arch/blackfin/Kconfig
@@ -898,6 +898,10 @@
 menu "Power management options"
 source "kernel/power/Kconfig"
 
+config ARCH_SUSPEND_POSSIBLE
+	def_bool y
+	depends on !SMP
+
 choice
 	prompt "Select PM Wakeup Event Source"
 	default PM_WAKEUP_GPIO_BY_SIC_IWR