iwlwifi: remove redundant flags regarding to FAT channel

This patch removes redundant flags regarding to FAT channel. Use
mac80211's flag instead.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@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 0acd42b..de40e89 100644
--- a/drivers/net/wireless/iwlwifi/iwl4965-base.c
+++ b/drivers/net/wireless/iwlwifi/iwl4965-base.c
@@ -664,9 +664,11 @@
 	iwl_conf->extension_chan_offset =
 		ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_SEC_OFFSET;
 	/* If no above or below channel supplied disable FAT channel */
-	if (iwl_conf->extension_chan_offset != IWL_EXT_CHANNEL_OFFSET_ABOVE &&
-	    iwl_conf->extension_chan_offset != IWL_EXT_CHANNEL_OFFSET_BELOW)
+	if (iwl_conf->extension_chan_offset != IEEE80211_HT_IE_CHA_SEC_ABOVE &&
+	    iwl_conf->extension_chan_offset != IEEE80211_HT_IE_CHA_SEC_BELOW) {
+		iwl_conf->extension_chan_offset = IEEE80211_HT_IE_CHA_SEC_NONE;
 		iwl_conf->supported_chan_width = 0;
+	}
 
 	iwl_conf->tx_mimo_ps_mode =
 		(u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);