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-4965.c b/drivers/net/wireless/iwlwifi/iwl-4965.c
index 6d313c8..a6518ca 100644
--- a/drivers/net/wireless/iwlwifi/iwl-4965.c
+++ b/drivers/net/wireless/iwlwifi/iwl-4965.c
@@ -2561,7 +2561,9 @@
 	},
 	.send_tx_power	= iwl4965_send_tx_power,
 	.update_chain_flags = iwl_update_chain_flags,
-	.isr = iwl_isr_legacy,
+	.isr_ops = {
+		.isr = iwl_isr_legacy,
+	},
 	.temp_ops = {
 		.temperature = iwl4965_temperature_calib,
 	},