mtd: maps: ixp4xx: 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>
diff --git a/drivers/mtd/maps/ixp4xx.c b/drivers/mtd/maps/ixp4xx.c
index b443074..e3180d5 100644
--- a/drivers/mtd/maps/ixp4xx.c
+++ b/drivers/mtd/maps/ixp4xx.c
@@ -226,7 +226,7 @@
 		err = -ENXIO;
 		goto Error;
 	}
-	info->mtd->owner = THIS_MODULE;
+	info->mtd->dev.parent = &dev->dev;
 
 	/* Use the fast version */
 	info->map.write = ixp4xx_write16;