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/sbc_gxx.c b/drivers/mtd/maps/sbc_gxx.c
index 04b2781..556a2df 100644
--- a/drivers/mtd/maps/sbc_gxx.c
+++ b/drivers/mtd/maps/sbc_gxx.c
@@ -182,7 +182,7 @@
 static void cleanup_sbc_gxx(void)
 {
 	if( all_mtd ) {
-		del_mtd_partitions( all_mtd );
+		mtd_device_unregister(all_mtd);
 		map_destroy( all_mtd );
 	}
 
@@ -223,7 +223,7 @@
 	all_mtd->owner = THIS_MODULE;
 
 	/* Create MTD devices for each partition. */
-	add_mtd_partitions(all_mtd, partition_info, NUM_PARTITIONS );
+	mtd_device_register(all_mtd, partition_info, NUM_PARTITIONS);
 
 	return 0;
 }