dm: move dm_table_destroy() to same header as dm_table_create()

If anyone is going to use dm_table_create(), they probably should be
able to use dm_table_destroy() too. Move the dm_table_destroy()
definition outside the private header, near dm_table_create()
Signed-off-by: Brian Norris <briannorris@chromium.org>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>

drivers/md/dm.h

@@ -49,7 +49,6 @@ struct dm_md_mempools;
 /*-----------------------------------------------------------------
  * Internal table functions.
  *---------------------------------------------------------------*/
-void dm_table_destroy(struct dm_table *t);
 void dm_table_event_callback(struct dm_table *t,
 			     void (*fn)(void *), void *context);
 struct dm_target *dm_table_get_target(struct dm_table *t, unsigned int index);

include/linux/device-mapper.h

@@ -459,6 +459,11 @@ void dm_table_set_type(struct dm_table *t, enum dm_queue_mode type);
  */
 int dm_table_complete(struct dm_table *t);
 
+/*
+ * Destroy the table when finished.
+ */
+void dm_table_destroy(struct dm_table *t);
+
 /*
  * Target may require that it is never sent I/O larger than len.
  */