mtd: introduce mtd_lock interface

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

drivers/mtd/maps/scb2_flash.c

@@ -205,7 +205,7 @@ scb2_flash_remove(struct pci_dev *dev)
 
 	/* disable flash writes */
 	if (scb2_mtd->lock)
-		scb2_mtd->lock(scb2_mtd, 0, scb2_mtd->size);
+		mtd_lock(scb2_mtd, 0, scb2_mtd->size);
 
 	mtd_device_unregister(scb2_mtd);
 	map_destroy(scb2_mtd);