iwlagn: merge duplicate code into single function

Same operation needed by multiple devices, move to single function.

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-2000.c b/drivers/net/wireless/iwlwifi/iwl-2000.c
index 56a22de..1c13300 100644
--- a/drivers/net/wireless/iwlwifi/iwl-2000.c
+++ b/drivers/net/wireless/iwlwifi/iwl-2000.c
@@ -74,21 +74,7 @@
 /* NIC configuration for 2000 series */
 static void iwl2000_nic_config(struct iwl_priv *priv)
 {
-	u16 radio_cfg;
-
-	radio_cfg = iwl_eeprom_query16(priv, EEPROM_RADIO_CONFIG);
-
-	/* write radio config values to register */
-	if (EEPROM_RF_CFG_TYPE_MSK(radio_cfg) <= EEPROM_RF_CONFIG_TYPE_MAX)
-		iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
-			    EEPROM_RF_CFG_TYPE_MSK(radio_cfg) |
-			    EEPROM_RF_CFG_STEP_MSK(radio_cfg) |
-			    EEPROM_RF_CFG_DASH_MSK(radio_cfg));
-
-	/* set CSR_HW_CONFIG_REG for uCode use */
-	iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
-		    CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
-		    CSR_HW_IF_CONFIG_REG_BIT_MAC_SI);
+	iwl_rf_config(priv);
 
 	if (priv->cfg->iq_invert)
 		iwl_set_bit(priv, CSR_GP_DRIVER_REG,