netxen: fix link event handling

Firmware starting 4.0.402 started supporting link events, disable
it for older firmwares.

Signed-off-by: Dhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/netxen/netxen_nic_main.c b/drivers/net/netxen/netxen_nic_main.c
index e877eef..8331580 100644
--- a/drivers/net/netxen/netxen_nic_main.c
+++ b/drivers/net/netxen/netxen_nic_main.c
@@ -797,7 +797,7 @@
 	if (adapter->max_sds_rings > 1)
 		netxen_config_rss(adapter, 1);
 
-	if (NX_IS_REVISION_P3(adapter->ahw.revision_id))
+	if (adapter->capabilities & NX_FW_CAPABILITY_LINK_NOTIFICATION)
 		netxen_linkevent_request(adapter, 1);
 
 	return 0;