PM: Drop CONFIG_PM_RUNTIME from the driver core

After commit b2b49ccbdd54 (PM: Kconfig: Set PM_RUNTIME if PM_SLEEP is
selected) PM_RUNTIME is always set if PM is set, so quite a few
depend on CONFIG_PM or even may be dropped entirely in some cases.

Replace CONFIG_PM_RUNTIME with CONFIG_PM in the PM core code.

Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Kevin Hilman <khilman@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
diff --git a/include/linux/pm.h b/include/linux/pm.h
index 383fd68..53b56cf 100644
--- a/include/linux/pm.h
+++ b/include/linux/pm.h
@@ -576,7 +576,7 @@
 #else
 	unsigned int		should_wakeup:1;
 #endif
-#ifdef CONFIG_PM_RUNTIME
+#ifdef CONFIG_PM
 	struct timer_list	suspend_timer;
 	unsigned long		timer_expires;
 	struct work_struct	work;