workqueue: make deferrable delayed_work initializer names consistent

Initalizers for deferrable delayed_work are confused.

* __DEFERRED_WORK_INITIALIZER()
* DECLARE_DEFERRED_WORK()
* INIT_DELAYED_WORK_DEFERRABLE()

Rename them to

* __DEFERRABLE_WORK_INITIALIZER()
* DECLARE_DEFERRABLE_WORK()
* INIT_DEFERRABLE_WORK()

This patch doesn't cause any functional changes.

Signed-off-by: Tejun Heo <tj@kernel.org>
diff --git a/drivers/power/ab8500_btemp.c b/drivers/power/ab8500_btemp.c
index bba3cca..3041514 100644
--- a/drivers/power/ab8500_btemp.c
+++ b/drivers/power/ab8500_btemp.c
@@ -1018,7 +1018,7 @@
 	}
 
 	/* Init work for measuring temperature periodically */
-	INIT_DELAYED_WORK_DEFERRABLE(&di->btemp_periodic_work,
+	INIT_DEFERRABLE_WORK(&di->btemp_periodic_work,
 		ab8500_btemp_periodic_work);
 
 	/* Identify the battery */