iwlwifi: use iwl_is_associated when possible

This patch add uses of iwl_is_associated in places it is suitable in.

Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl4965-base.c b/drivers/net/wireless/iwlwifi/iwl4965-base.c
index 1558b9a..a2dffe4 100644
--- a/drivers/net/wireless/iwlwifi/iwl4965-base.c
+++ b/drivers/net/wireless/iwlwifi/iwl4965-base.c
@@ -192,7 +192,7 @@
 {
 
 	/* These items are only settable from the full RXON command */
-	if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
+	if (!(iwl_is_associated(priv)) ||
 	    compare_ether_addr(priv->staging_rxon.bssid_addr,
 			       priv->active_rxon.bssid_addr) ||
 	    compare_ether_addr(priv->staging_rxon.node_addr,
@@ -3008,7 +3008,7 @@
 		return;
 
 	/* The following should be done only at AP bring up */
-	if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
+	if (!(iwl_is_associated(priv))) {
 
 		/* RXON - unassoc (to set timing command) */
 		priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;