netxen: fix promisc mode, mtu setting

For NX3031, multicast filtering, promisc mode, and max frame size
setting is handled by firmware, driver needs to send request to
enable/disable it.

For old chip revisions / firmware, driver still sets it directly.

Added function pointer to set mtu according to chip revision.

Signed-off-by: Dhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
diff --git a/drivers/net/netxen/netxen_nic_main.c b/drivers/net/netxen/netxen_nic_main.c
index 311a4bd..7615c71 100644
--- a/drivers/net/netxen/netxen_nic_main.c
+++ b/drivers/net/netxen/netxen_nic_main.c
@@ -1113,9 +1113,7 @@
 	netxen_nic_set_link_parameters(adapter);
 
 	netdev->set_multicast_list(netdev);
-	if (NX_IS_REVISION_P3(adapter->ahw.revision_id))
-		nx_fw_cmd_set_mtu(adapter, netdev->mtu);
-	else
+	if (adapter->set_mtu)
 		adapter->set_mtu(adapter, netdev->mtu);
 
 	mod_timer(&adapter->watchdog_timer, jiffies);