mtd: rawnand: Convert to using %pOFn instead of device_node.name

In preparation to remove the node name pointer from struct device_node,
convert printf users to use the %pOFn format specifier.

Cc: Boris Brezillon <boris.brezillon@bootlin.com>
Cc: Miquel Raynal <miquel.raynal@bootlin.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Brian Norris <computersforpeace@gmail.com>
Cc: Marek Vasut <marek.vasut@gmail.com>
Cc: linux-mtd@lists.infradead.org
Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Boris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

drivers/mtd/nand/raw/fsl_upm.c

@@ -184,8 +184,8 @@ static int fun_chip_init(struct fsl_upm_nand *fun,
 		return -ENODEV;
 
 	nand_set_flash_node(&fun->chip, flash_np);
-	mtd->name = kasprintf(GFP_KERNEL, "0x%llx.%s", (u64)io_res->start,
-			      flash_np->name);
+	mtd->name = kasprintf(GFP_KERNEL, "0x%llx.%pOFn", (u64)io_res->start,
+			      flash_np);
 	if (!mtd->name) {
 		ret = -ENOMEM;
 		goto err;

drivers/mtd/nand/raw/ndfc.c

@@ -174,8 +174,8 @@ static int ndfc_chip_init(struct ndfc_controller *ndfc,
 		return -ENODEV;
 	nand_set_flash_node(chip, flash_np);
 
-	mtd->name = kasprintf(GFP_KERNEL, "%s.%s", dev_name(&ndfc->ofdev->dev),
-			      flash_np->name);
+	mtd->name = kasprintf(GFP_KERNEL, "%s.%pOFn", dev_name(&ndfc->ofdev->dev),
+			      flash_np);
 	if (!mtd->name) {
 		ret = -ENOMEM;
 		goto err;