libertas: precedence bug

Negate has precedence over comparison so the original test was always
false.  (Neither 0 nor 1 are equal to NL80211_IFTYPE_MONITOR).
Signed-off-by: NDan Carpenter <error27@gmail.com>
Acked-by: NDan Williams <dcbw@redhat.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/libertas/tx.c

@@ -180,7 +180,7 @@ void lbs_send_tx_feedback(struct lbs_private *priv, u32 try_count)
 {
 	struct tx_radiotap_hdr *radiotap_hdr;
 
-	if (!priv->wdev->iftype == NL80211_IFTYPE_MONITOR ||
+	if (priv->wdev->iftype != NL80211_IFTYPE_MONITOR ||
 	    priv->currenttxskb == NULL)
 		return;