PM: Remove saved_state from struct dev_pm_info

The saved_state member of struct dev_pm_info, defined in include/linux/pm.h, is
not used anywhere, so it can be removed.
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

include/linux/pm.h

@@ -268,7 +268,6 @@ struct dev_pm_info {
 #ifdef	CONFIG_PM
 	unsigned		should_wakeup:1;
 	pm_message_t		prev_state;
-	void			* saved_state;
 	struct list_head	entry;
 #endif
 };