[RFC] net: macb: enable IPv6 support for TSO

[zuoqian]

New Cadence GEM hardware support TSO for both ipv4 and IPv6 protocols,
but the driver currently lacks the NETIF_F_TSO6 feature flag for IPv6 TSO.

Signed-off-by: zuoqian <zuoqian113@xxxxxxxxx>
---
 drivers/net/ethernet/cadence/macb_main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c
index 214f543af3b8..a154c9f3c325 100644
--- a/drivers/net/ethernet/cadence/macb_main.c
+++ b/drivers/net/ethernet/cadence/macb_main.c
@@ -78,7 +78,7 @@ struct sifive_fu540_macb_mgmt {
 #define GEM_MAX_TX_LEN		(unsigned int)(0x3FC0)
 
 #define GEM_MTU_MIN_SIZE	ETH_MIN_MTU
-#define MACB_NETIF_LSO		NETIF_F_TSO
+#define MACB_NETIF_LSO		(NETIF_F_TSO | NETIF_F_TSO6)
 
 #define MACB_WOL_ENABLED		BIT(0)
 
-- 
2.49.0