mtd: nand: orion_nand: show parent device in sysfs

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

While at it, make use of the default owner value set by mtdcore.
Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>

drivers/mtd/nand/orion_nand.c

@@ -124,7 +124,7 @@ static int __init orion_nand_probe(struct platform_device *pdev)
 	}
 
 	mtd->priv = nc;
-	mtd->owner = THIS_MODULE;
+	mtd->dev.parent = &pdev->dev;
 
 	nc->priv = board;
 	nc->IO_ADDR_R = nc->IO_ADDR_W = io_base;