rt2x00: Update some TX descriptor

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rt2x00/rt2x00queue.h

@@ -288,8 +288,8 @@ enum txentry_desc_flags {
  * @signal: PLCP signal.
  * @service: PLCP service.
  * @msc: MCS.
- * @stbc: STBC.
- * @ba_size: BA size.
+ * @stbc: Use Space Time Block Coding (only available for MCS rates < 8).
+ * @ba_size: Size of the recepients RX reorder buffer - 1.
  * @rate_mode: Rate mode (See @enum rate_modulation).
  * @mpdu_density: MDPU density.
  * @retry_limit: Max number of retries.