iwlwifi: replace test_and_set_bit by set_bit in clear stations function

This patch replaces test_and_set_bit by set_bit since the bit is not
tested anyway

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-sta.c b/drivers/net/wireless/iwlwifi/iwl-sta.c
index 17a4dd2..28dd225 100644
--- a/drivers/net/wireless/iwlwifi/iwl-sta.c
+++ b/drivers/net/wireless/iwlwifi/iwl-sta.c
@@ -490,7 +490,7 @@
 	/* keep track of static keys */
 	for (i = 0; i < WEP_KEYS_MAX ; i++) {
 		if (priv->wep_keys[i].key_size)
-			test_and_set_bit(i, &priv->ucode_key_table);
+			set_bit(i, &priv->ucode_key_table);
 	}
 
 	spin_unlock_irqrestore(&priv->sta_lock, flags);