mac80211: fix typo in comments

The flag is called IEEE80211_TX_STAT_AMPDU rather than using the whole word
STATUS.
Signed-off-by: Daniel Halperin <dhalperi@cs.washington.edu>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

include/net/mac80211.h

@@ -397,11 +397,11 @@ struct ieee80211_tx_rate {
  * @status: union for status data
  * @driver_data: array of driver_data pointers
  * @ampdu_ack_len: number of acked aggregated frames.
- * 	relevant only if IEEE80211_TX_STATUS_AMPDU was set.
+ * 	relevant only if IEEE80211_TX_STAT_AMPDU was set.
  * @ampdu_ack_map: block ack bit map for the aggregation.
- * 	relevant only if IEEE80211_TX_STATUS_AMPDU was set.
+ * 	relevant only if IEEE80211_TX_STAT_AMPDU was set.
  * @ampdu_len: number of aggregated frames.
- * 	relevant only if IEEE80211_TX_STATUS_AMPDU was set.
+ * 	relevant only if IEEE80211_TX_STAT_AMPDU was set.
  * @ack_signal: signal strength of the ACK frame
  */
 struct ieee80211_tx_info {