ipw2200: make association only if SSID is known.

'iwconfig eth1 channel 6' would trigger association to _something_,
which is wrong.  Changing the channel should (and does) trigger reassociation,
but only if there is an SSID to associate with.
Signed-off-by: NAlexey Fisher <bug-track@fisher-privat.net>
Acked-by: NZhu Yi <yi.zhu@intel.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ipw2200.c

@@ -7575,8 +7575,7 @@ static int ipw_associate(void *data)
 	}
 
 	if (!(priv->config & CFG_ASSOCIATE) &&
-	    !(priv->config & (CFG_STATIC_ESSID |
-			      CFG_STATIC_CHANNEL | CFG_STATIC_BSSID))) {
+	    !(priv->config & (CFG_STATIC_ESSID | CFG_STATIC_BSSID))) {
 		IPW_DEBUG_ASSOC("Not attempting association (associate=0)\n");
 		return 0;
 	}