iwlwifi: put all the isr related function under ops

There were two type of isr supported by iwlwifi devices.
  legacy isr - only used by legacy devices (3945 & 4965)
  ict isr - used by all new generation of iwlwifi devices

Move all the isr related functions into ops, the ict type of isr
supports only needed for newer devices.

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 5730174..007fb20 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn.c
@@ -2815,7 +2815,8 @@
 				STATUS_EXIT_PENDING;
 
 	/* device going down, Stop using ICT table */
-	iwl_disable_ict(priv);
+	if (priv->cfg->ops->lib->isr_ops.disable)
+		priv->cfg->ops->lib->isr_ops.disable(priv);
 
 	iwlagn_txq_ctx_stop(priv);
 	iwlagn_rxq_stop(priv);
@@ -3038,7 +3039,8 @@
 		return;
 
 	/* enable dram interrupt */
-	iwl_reset_ict(priv);
+	if (priv->cfg->ops->lib->isr_ops.reset)
+		priv->cfg->ops->lib->isr_ops.reset(priv);
 
 	mutex_lock(&priv->mutex);
 	iwl_alive_start(priv);
@@ -4172,8 +4174,10 @@
 
 	pci_enable_msi(priv->pci_dev);
 
-	iwl_alloc_isr_ict(priv);
-	err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
+	if (priv->cfg->ops->lib->isr_ops.alloc)
+		priv->cfg->ops->lib->isr_ops.alloc(priv);
+
+	err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr_ops.isr,
 			  IRQF_SHARED, DRV_NAME, priv);
 	if (err) {
 		IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
@@ -4220,7 +4224,8 @@
 	destroy_workqueue(priv->workqueue);
 	priv->workqueue = NULL;
 	free_irq(priv->pci_dev->irq, priv);
-	iwl_free_isr_ict(priv);
+	if (priv->cfg->ops->lib->isr_ops.free)
+		priv->cfg->ops->lib->isr_ops.free(priv);
  out_disable_msi:
 	pci_disable_msi(priv->pci_dev);
 	iwl_uninit_drv(priv);
@@ -4315,7 +4320,8 @@
 
 	iwl_uninit_drv(priv);
 
-	iwl_free_isr_ict(priv);
+	if (priv->cfg->ops->lib->isr_ops.free)
+		priv->cfg->ops->lib->isr_ops.free(priv);
 
 	dev_kfree_skb(priv->beacon_skb);