iwlagn: more comments for bt channel inhibition

Add comments for better description

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn.c b/drivers/net/wireless/iwlwifi/iwl-agn.c
index be2ba4dd..a79ee7a 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn.c
@@ -3542,7 +3542,7 @@
 module_param_named(bt_ch_inhibition, iwlagn_mod_params.bt_ch_announce,
 		   bool, S_IRUGO);
 MODULE_PARM_DESC(bt_ch_inhibition,
-		 "Disable BT channel inhibition (default: enable)");
+		 "Enable BT channel inhibition (default: enable)");
 
 module_param_named(plcp_check, iwlagn_mod_params.plcp_check, bool, S_IRUGO);
 MODULE_PARM_DESC(plcp_check, "Check plcp health (default: 1 [enabled])");