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/tsunami_flash.c b/drivers/mtd/maps/tsunami_flash.c
index 77a8bfc..1de390e 100644
--- a/drivers/mtd/maps/tsunami_flash.c
+++ b/drivers/mtd/maps/tsunami_flash.c
@@ -76,7 +76,7 @@
 	struct mtd_info *mtd;
 	mtd = tsunami_flash_mtd;
 	if (mtd) {
-		del_mtd_device(mtd);
+		mtd_device_unregister(mtd);
 		map_destroy(mtd);
 	}
 	tsunami_flash_mtd = 0;
@@ -97,7 +97,7 @@
 	}
 	if (tsunami_flash_mtd) {
 		tsunami_flash_mtd->owner = THIS_MODULE;
-		add_mtd_device(tsunami_flash_mtd);
+		mtd_device_register(tsunami_flash_mtd, NULL, 0);
 		return 0;
 	}
 	return -ENXIO;