mtd: use MTD_OPS_PLACE_OOB macro consistently

Use the MTD_OPS_PLACE_OOB to replace the hard code "0".
Make the code more readable.

Signed-off-by: Huang Shijie <b32955@freescale.com>
Acked-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index 98ba46e..ead301a 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -1625,7 +1625,7 @@
 	ops.len = len;
 	ops.datbuf = buf;
 	ops.oobbuf = NULL;
-	ops.mode = 0;
+	ops.mode = MTD_OPS_PLACE_OOB;
 	ret = nand_do_read_ops(mtd, from, &ops);
 	*retlen = ops.retlen;
 	nand_release_device(mtd);
@@ -2331,7 +2331,7 @@
 	ops.len = len;
 	ops.datbuf = (uint8_t *)buf;
 	ops.oobbuf = NULL;
-	ops.mode = 0;
+	ops.mode = MTD_OPS_PLACE_OOB;
 
 	ret = nand_do_write_ops(mtd, to, &ops);
 
@@ -2360,7 +2360,7 @@
 	ops.len = len;
 	ops.datbuf = (uint8_t *)buf;
 	ops.oobbuf = NULL;
-	ops.mode = 0;
+	ops.mode = MTD_OPS_PLACE_OOB;
 	ret = nand_do_write_ops(mtd, to, &ops);
 	*retlen = ops.retlen;
 	nand_release_device(mtd);