mtd: maps: lantiq-flash: show parent device in sysfs

Fix a bug where mtd 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/maps/lantiq-flash.c

@@ -160,7 +160,7 @@ ltq_mtd_probe(struct platform_device *pdev)
 		return -ENXIO;
 	}
 
-	ltq_mtd->mtd->owner = THIS_MODULE;
+	ltq_mtd->mtd->dev.parent = &pdev->dev;
 
 	cfi = ltq_mtd->map->fldrv_priv;
 	cfi->addr_unlock1 ^= 1;