mac80211: fix RX aggregation timeouts

The values are in TUs (1.024ms), not ms.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 67bd522..5b23001 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -57,6 +57,8 @@
  */
 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
 
+#define TU_TO_EXP_TIME(x)	(jiffies + usecs_to_jiffies((x) * 1024))
+
 struct ieee80211_fragment_entry {
 	unsigned long first_frag_time;
 	unsigned int seq;