mtd: spi-nor: drop flash_node field

We can just alias to the MTD of_node.
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>

drivers/mtd/spi-nor/spi-nor.c

@@ -1258,7 +1258,6 @@ int spi_nor_scan(struct spi_nor *nor, const char *name, enum read_mode mode)
 		mtd->flags |= MTD_NO_ERASE;
 
 	mtd->dev.parent = dev;
-	mtd_set_of_node(mtd, np);
 	nor->page_size = info->page_size;
 	mtd->writebufsize = nor->page_size;
 

include/linux/mtd/spi-nor.h

@@ -124,7 +124,6 @@ struct mtd_info;
  * @mtd:		point to a mtd_info structure
  * @lock:		the lock for the read/write/erase/lock/unlock operations
  * @dev:		point to a spi device, or a spi nor controller device.
- * @flash_node:		point to a device node describing this flash instance.
  * @page_size:		the page size of the SPI NOR
  * @addr_width:		number of address bytes
  * @erase_opcode:	the opcode for erasing a sector
@@ -155,7 +154,6 @@ struct spi_nor {
 	struct mtd_info		mtd;
 	struct mutex		lock;
 	struct device		*dev;
-	struct device_node	*flash_node;
 	u32			page_size;
 	u8			addr_width;
 	u8			erase_opcode;
@@ -188,12 +186,12 @@ struct spi_nor {
 static inline void spi_nor_set_flash_node(struct spi_nor *nor,
 					  struct device_node *np)
 {
-	nor->flash_node = np;
+	mtd_set_of_node(&nor->mtd, np);
 }
 
 static inline struct device_node *spi_nor_get_flash_node(struct spi_nor *nor)
 {
-	return nor->flash_node;
+	return mtd_get_of_node(&nor->mtd);
 }
 
 /**