mac80211: fix sparse complaint in ieee80211_sta_def_wmm_params

A variable 'i' is being shadowed by another one, but the second
one can just be removed.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Cc: Vladimir Koutny <vlado@work.ksp.sk>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

net/mac80211/ieee80211_sta.c

@@ -244,7 +244,6 @@ static void ieee80211_sta_def_wmm_params(struct net_device *dev,
 
 	if (local->ops->conf_tx) {
 		struct ieee80211_tx_queue_params qparam;
-		int i;
 
 		memset(&qparam, 0, sizeof(qparam));