[TG3]: define TG3_FLG2_5750_PLUS flag

Define TG3_FLG2_5750_PLUS flag and set it in tg3_get_invariants for
ASIC_REV_5750 or ASIC_REV_5752.

Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index 7ff598c..7b21b07 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -7951,6 +7951,10 @@
 
 	if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5750 ||
 	    GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5752)
+		tp->tg3_flags2 |= TG3_FLG2_5750_PLUS;
+
+	if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5750 ||
+	    GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5752)
 		tp->tg3_flags2 |= TG3_FLG2_HW_TSO;
 
 	if (pci_find_capability(tp->pdev, PCI_CAP_ID_EXP) != 0)