Standardization of some function headers.

drivers/power/pm_unregister.c

@@ -63,7 +63,7 @@
  *   callbacks - An instance of struct pm_callback_s providing the driver
  *               callback functions.
  *
- * Returned value:
+ * Returned Value:
  *    Zero (OK) on success; otherwise a negated errno value is returned.
  *
  ****************************************************************************/

include/nuttx/power/pm.h

@@ -403,7 +403,7 @@ int pm_register(FAR struct pm_callback_s *callbacks);
  *   callbacks - An instance of struct pm_callback_s providing the driver
  *               callback functions.
  *
- * Returned value:
+ * Returned Value:
  *    Zero (OK) on success; otherwise a negated errno value is returned.
  *
  ****************************************************************************/

sched/sched/sched_thistask.c

@@ -62,7 +62,7 @@
  *   on the current CPU. In SMP, this must be done by disabling local
  *   interrupts to avoid CPU switching during access to current_task()
  *
- * Return Value:
+ * Returned Value:
  *   the TCB that is currently running on the current CPU.
  *
  ****************************************************************************/