staging: mt29f_spinand: show parent device in sysfs

Fix a bug where mtd parent device symlinks aren't shown in sysfs.

While at it, take advantage of the default owner and name values set by
mtdcore.
Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>

drivers/staging/mt29f_spinand/mt29f_spinand.c

@@ -912,8 +912,7 @@ static int spinand_probe(struct spi_device *spi_nand)
 	dev_set_drvdata(&spi_nand->dev, mtd);
 
 	mtd->priv = chip;
-	mtd->name = dev_name(&spi_nand->dev);
-	mtd->owner = THIS_MODULE;
+	mtd->dev.parent = &spi_nand->dev;
 	mtd->oobsize = 64;
 
 	if (nand_scan(mtd, 1))