mac80211: more kernel-doc fixes

Fix (delete) more mac80211 kernel-doc:

Warning(linux-2.6.28-git13//include/net/mac80211.h:375): Excess struct/union/enum/typedef member 'retry_count' description in 'ieee80211_tx_info'
Warning(linux-2.6.28-git13//net/mac80211/sta_info.h:308): Excess struct/union/enum/typedef member 'last_txrate' description in 'sta_info'

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index b3bd00a..559422f 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -322,7 +322,6 @@
  * @control: union for control data
  * @status: union for status data
  * @driver_data: array of driver_data pointers
- * @retry_count: number of retries
  * @ampdu_ack_len: number of aggregated frames.
  * 	relevant only if IEEE80211_TX_STATUS_AMPDU was set.
  * @ampdu_ack_map: block ack bit map for the aggregation.
diff --git a/net/mac80211/sta_info.h b/net/mac80211/sta_info.h
index dc2606d..e49a5b9 100644
--- a/net/mac80211/sta_info.h
+++ b/net/mac80211/sta_info.h
@@ -195,7 +195,6 @@
  * @tx_packets: number of RX/TX MSDUs
  * @tx_bytes: number of bytes transmitted to this STA
  * @tx_fragments: number of transmitted MPDUs
- * @last_txrate: description of the last used transmit rate
  * @tid_seq: per-TID sequence numbers for sending to this STA
  * @ampdu_mlme: A-MPDU state machine state
  * @timer_to_tid: identity mapping to ID timers