mtd: rename MTD_OOB_* to MTD_OPS_*

These modes are not necessarily for OOB only. Particularly, MTD_OOB_RAW
affected operations on in-band page data as well. To clarify these
options and to emphasize that their effect is applied per-operation, we
change the primary prefix to MTD_OPS_.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@intel.com>
diff --git a/drivers/mtd/mtdpart.c b/drivers/mtd/mtdpart.c
index c90b7ba..cd7785a 100644
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -130,7 +130,7 @@
 	if (ops->oobbuf) {
 		size_t len, pages;
 
-		if (ops->mode == MTD_OOB_AUTO)
+		if (ops->mode == MTD_OPS_AUTO_OOB)
 			len = mtd->oobavail;
 		else
 			len = mtd->oobsize;