iwlagn: kill iwlagn_setup_deferred_work

Since iwlagn_setup_deferred_work is always called, fold it into
iwl_setup_deferred_work. BT related works are setup by the new
bt_setup_deferred_work lib_ops.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.guy@intel.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn.c b/drivers/net/wireless/iwlwifi/iwl-agn.c
index d50c68a..503c786 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn.c
@@ -2845,8 +2845,8 @@
 
 	iwl_setup_scan_deferred_work(priv);
 
-	if (priv->cfg->lib->setup_deferred_work)
-		priv->cfg->lib->setup_deferred_work(priv);
+	if (priv->cfg->lib->bt_setup_deferred_work)
+		priv->cfg->lib->bt_setup_deferred_work(priv);
 
 	init_timer(&priv->statistics_periodic);
 	priv->statistics_periodic.data = (unsigned long)priv;