drivers/mtd/: Spelling fixes

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Adrian Bunk <bunk@kernel.org>
diff --git a/drivers/mtd/nand/cs553x_nand.c b/drivers/mtd/nand/cs553x_nand.c
index 89deff0..19e1594 100644
--- a/drivers/mtd/nand/cs553x_nand.c
+++ b/drivers/mtd/nand/cs553x_nand.c
@@ -337,7 +337,7 @@
 		nand_release(cs553x_mtd[i]);
 		cs553x_mtd[i] = NULL;
 
-		/* unmap physical adress */
+		/* unmap physical address */
 		iounmap(mmio_base);
 
 		/* Free the MTD device structure */