CONFIG_PM_SLEEP fix: xen: fix compilation when CONFIG_PM_SLEEP is disabled

Xen save/restore depends on CONFIG_PM_SLEEP being set for device_power_up/down.
Signed-off-by: NJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Acked-by: NRandy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

drivers/xen/manage.c

@@ -31,6 +31,7 @@ enum shutdown_state {
 /* Ignore multiple shutdown requests. */
 static enum shutdown_state shutting_down = SHUTDOWN_INVALID;
 
+#ifdef CONFIG_PM_SLEEP
 static int xen_suspend(void *data)
 {
 	int *cancelled = data;
@@ -121,6 +122,7 @@ static void do_suspend(void)
 #endif
 	shutting_down = SHUTDOWN_INVALID;
 }
+#endif	/* CONFIG_PM_SLEEP */
 
 static void shutdown_handler(struct xenbus_watch *watch,
 			     const char **vec, unsigned int len)