ACPI: restore CONFIG_ACPI_SLEEP

Restore the 2.6.22 CONFIG_ACPI_SLEEP build option, but now shadowing the
new CONFIG_PM_SLEEP option.

Signed-off-by: Len Brown <len.brown@intel.com>
[ Modified to work with the PM config setup changes. ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

include/acpi/acpi_drivers.h

@@ -147,7 +147,7 @@ static inline void unregister_hotplug_dock_device(acpi_handle handle)
 /*--------------------------------------------------------------------------
                                   Suspend/Resume
   -------------------------------------------------------------------------- */
-#ifdef CONFIG_PM_SLEEP
+#ifdef CONFIG_ACPI_SLEEP
 extern int acpi_sleep_init(void);
 #else
 static inline int acpi_sleep_init(void) { return 0; }