xen: make CONFIG_XEN_SAVE_RESTORE depend on CONFIG_XEN

Xen options need to depend on XEN.
Also, add newline at end of file.

Without this patch you need to disable CONFIG_PM in order to
disable CPU hotplugging.
Signed-off-by: NChuck Ebbert <cebbert@redhat.com>
Acked-by Jeremy Fitzhardinge <jeremy@goop.org>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

arch/x86/xen/Kconfig

@@ -26,7 +26,7 @@ config XEN_MAX_DOMAIN_MEMORY
 
 config XEN_SAVE_RESTORE
        bool
-       depends on PM
+       depends on XEN && PM
        default y
 
 config XEN_DEBUG_FS
@@ -35,4 +35,4 @@ config XEN_DEBUG_FS
 	default n
 	help
 	  Enable statistics output and various tuning options in debugfs.
-	  Enabling this option may incur a significant performance overhead.
\ No newline at end of file
+	  Enabling this option may incur a significant performance overhead.