mtd: introduce mtd_write_oob interface

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h
index 0db8d87..abbc96a 100644
--- a/include/linux/mtd/mtd.h
+++ b/include/linux/mtd/mtd.h
@@ -190,16 +190,14 @@
 			    size_t *retlen, const u_char *buf);
 	int (*read_oob) (struct mtd_info *mtd, loff_t from,
 			 struct mtd_oob_ops *ops);
+	int (*write_oob) (struct mtd_info *mtd, loff_t to,
+			  struct mtd_oob_ops *ops);
 
 	/* Backing device capabilities for this device
 	 * - provides mmap capabilities
 	 */
 	struct backing_dev_info *backing_dev_info;
 
-
-	int (*write_oob) (struct mtd_info *mtd, loff_t to,
-			 struct mtd_oob_ops *ops);
-
 	/*
 	 * Methods to access the protection register area, present in some
 	 * flash devices. The user data is one time programmable but the
@@ -326,6 +324,12 @@
 	return mtd->read_oob(mtd, from, ops);
 }
 
+static inline int mtd_write_oob(struct mtd_info *mtd, loff_t to,
+				struct mtd_oob_ops *ops)
+{
+	return mtd->write_oob(mtd, to, ops);
+}
+
 static inline struct mtd_info *dev_to_mtd(struct device *dev)
 {
 	return dev ? dev_get_drvdata(dev) : NULL;