mac80211: Fix missing kernel-doc notation

Fix the following htmldocs warnings:

  Warning(net/mac80211/sta_info.h:322): No description found for parameter 'drv_unblock_wk'
  Warning(net/mac80211/sta_info.h:322): No description found for parameter 'drv_unblock_wk'

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: John W. Linville <linville@tuxdriver.com>
Cc: Randy Dunlap <randy.dunlap@oracle.com>
Cc: David Miller <davem@davemloft.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/sta_info.h b/net/mac80211/sta_info.h
index 4c84c22..b4810f6 100644
--- a/net/mac80211/sta_info.h
+++ b/net/mac80211/sta_info.h
@@ -185,6 +185,7 @@
  * @lock: used for locking all fields that require locking, see comments
  *	in the header file.
  * @flaglock: spinlock for flags accesses
+ * @drv_unblock_wk: used for driver PS unblocking
  * @listen_interval: listen interval of this station, when we're acting as AP
  * @pin_status: used internally for pinning a STA struct into memory
  * @flags: STA flags, see &enum ieee80211_sta_info_flags
@@ -225,7 +226,6 @@
  * @debugfs: debug filesystem info
  * @sta: station information we share with the driver
  * @dead: set to true when sta is unlinked
- * @drv_unblock_wk used for driver PS unblocking
  */
 struct sta_info {
 	/* General information, mostly static */