mtd: ofpart: drop 'of_node' partition parser data

This field is no longer used anywhere, as it is superseded by
mtd->dev.of_node.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>

include/linux/mtd/partitions.h

@@ -56,13 +56,9 @@ struct device_node;
 /**
  * struct mtd_part_parser_data - used to pass data to MTD partition parsers.
  * @origin: for RedBoot, start address of MTD device
- * @of_node: for OF parsers, device node containing partitioning information.
- *           This field is deprecated, as the device node should simply be
- *           assigned to the master struct device.
  */
 struct mtd_part_parser_data {
 	unsigned long origin;
-	struct device_node *of_node;
 };