mtd: convert remaining users to mtd_device_register()

The older add_mtd_device()/add_mtd_partitions() and their removal
counterparts will soon be gone.  Replace uses with mtd_device_register()
and mtd_device_unregister().

Signed-off-by: Jamie Iles <jamie@jamieiles.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
diff --git a/drivers/mtd/maps/amd76xrom.c b/drivers/mtd/maps/amd76xrom.c
index 92de7e3..e2875d6 100644
--- a/drivers/mtd/maps/amd76xrom.c
+++ b/drivers/mtd/maps/amd76xrom.c
@@ -82,7 +82,7 @@
 		if (map->rsrc.parent) {
 			release_resource(&map->rsrc);
 		}
-		del_mtd_device(map->mtd);
+		mtd_device_unregister(map->mtd);
 		map_destroy(map->mtd);
 		list_del(&map->list);
 		kfree(map);
@@ -262,7 +262,7 @@
 
 		/* Now that the mtd devices is complete claim and export it */
 		map->mtd->owner = THIS_MODULE;
-		if (add_mtd_device(map->mtd)) {
+		if (mtd_device_register(map->mtd, NULL, 0)) {
 			map_destroy(map->mtd);
 			map->mtd = NULL;
 			goto out;