iwl3945: Define send_tx_power

We can define this iwl_lib ops for 3945, as this would help us cleaning the
scanning code.

Signed-off-by: Samuel Ortiz <samuel.ortiz@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl3945-base.c b/drivers/net/wireless/iwlwifi/iwl3945-base.c
index de8c8d7..997ac33 100644
--- a/drivers/net/wireless/iwlwifi/iwl3945-base.c
+++ b/drivers/net/wireless/iwlwifi/iwl3945-base.c
@@ -744,7 +744,7 @@
 
 	/* If we issue a new RXON command which required a tune then we must
 	 * send a new TXPOWER command or we won't be able to Tx any frames */
-	rc = iwl3945_hw_reg_send_txpower(priv);
+	rc = priv->cfg->ops->lib->send_tx_power(priv);
 	if (rc) {
 		IWL_ERR(priv, "Error setting Tx power (%d).\n", rc);
 		return rc;
@@ -5517,7 +5517,7 @@
 	/* Since setting the TXPOWER may have been deferred while
 	 * performing the scan, fire one off */
 	mutex_lock(&priv->mutex);
-	iwl3945_hw_reg_send_txpower(priv);
+	priv->cfg->ops->lib->send_tx_power(priv);
 	mutex_unlock(&priv->mutex);
 }