cxgb - fix T2 GSO

The patch ensures that a GSO skb has enough headroom
to push an encapsulating cpl_tx_pkt_lso header.

Signed-off-by: Divy Le Ray <divy@chelsio.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/net/chelsio/cxgb2.c b/drivers/net/chelsio/cxgb2.c
old mode 100644
new mode 100755
index 2dbf8dc..2461f91
--- a/drivers/net/chelsio/cxgb2.c
+++ b/drivers/net/chelsio/cxgb2.c
@@ -401,7 +401,8 @@
 	"TxTso",
 	"RxVlan",
 	"TxVlan",
-
+	"TxNeedHeadroom", 
+	
 	/* Interrupt stats */
 	"rx drops",
 	"pure_rsps",