cxgb3 - detect NIC only adapters

Differentiate NIC only adapters from RNICs.
Initialize offload capabilities for RNICs only.

Signed-off-by: Divy Le Ray <divy@chelsio.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/net/cxgb3/mc5.c b/drivers/net/cxgb3/mc5.c
index 644d62e..84c1ffa 100644
--- a/drivers/net/cxgb3/mc5.c
+++ b/drivers/net/cxgb3/mc5.c
@@ -328,6 +328,9 @@
 	unsigned int tcam_size = mc5->tcam_size;
 	struct adapter *adap = mc5->adapter;
 
+	if (!tcam_size)
+		return 0;
+
 	if (nroutes > MAX_ROUTES || nroutes + nservers + nfilters > tcam_size)
 		return -EINVAL;