mei: rename mei_free_cb_private to mei_io_cb_free

1. cb_private was an old name that we depriacated in earlier
cleanups

2. we also group the funcion declaration with other _io_
functions

3. Don't check cb for NULL as mei_io_cb_free is NULL safe

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/misc/mei/init.c b/drivers/misc/mei/init.c
index 2275cf0..4666f0b 100644
--- a/drivers/misc/mei/init.c
+++ b/drivers/misc/mei/init.c
@@ -341,7 +341,7 @@
 	/* remove all waiting requests */
 	list_for_each_entry_safe(cb_pos, cb_next, &dev->write_list.list, list) {
 		list_del(&cb_pos->list);
-		mei_free_cb_private(cb_pos);
+		mei_io_cb_free(cb_pos);
 	}
 }
 
@@ -715,7 +715,7 @@
 	mei_io_list_flush(&dev->ctrl_rd_list, cl);
 	mei_io_list_flush(&dev->ctrl_wr_list, cl);
 free:
-	mei_free_cb_private(cb);
+	mei_io_cb_free(cb);
 	return rets;
 }