MTD: kernel-doc fixes + additions

Fix some kernel-doc typos/spellos.
Use kernel-doc syntax in places where it was almost used.
Correct/add struct, struct field, and function param names where needed.

Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h
index 9b7a2b5..94a443d 100644
--- a/include/linux/mtd/mtd.h
+++ b/include/linux/mtd/mtd.h
@@ -77,11 +77,11 @@
  *
  * @len:	number of bytes to write/read. When a data buffer is given
  *		(datbuf != NULL) this is the number of data bytes. When
- +		no data buffer is available this is the number of oob bytes.
+ *		no data buffer is available this is the number of oob bytes.
  *
  * @retlen:	number of bytes written/read. When a data buffer is given
  *		(datbuf != NULL) this is the number of data bytes. When
- +		no data buffer is available this is the number of oob bytes.
+ *		no data buffer is available this is the number of oob bytes.
  *
  * @ooblen:	number of oob bytes per page
  * @ooboffs:	offset of oob data in the oob area (only relevant when