staging: wfx: make warning about pending frame less scary

Removing station while some traffic is in progress may happen.
Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20200310101356.182818-4-Jerome.Pouiller@silabs.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/wfx/sta.c

@@ -605,7 +605,9 @@ int wfx_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 	int i;
 
 	for (i = 0; i < ARRAY_SIZE(sta_priv->buffered); i++)
-		WARN(sta_priv->buffered[i], "release station while Tx is in progress");
+		if (sta_priv->buffered[i])
+			dev_warn(wvif->wdev->dev, "release station while %d pending frame on queue %d",
+				 sta_priv->buffered[i], i);
 	// FIXME: see note in wfx_sta_add()
 	if (vif->type == NL80211_IFTYPE_STATION)
 		return 0;