net: airoha: Enable TSO/Scatter Gather for LAN port

Set net_device vlan_features in order to enable TSO and Scatter Gather
for DSA user ports.

Reviewed-by: Mateusz Polchlopek <mateusz.polchlopek@intel.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20250304-lan-enable-tso-v1-1-b398eb9976ba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Author: LorenzoBianconi

drivers/net/ethernet/airoha/airoha_eth.c

@@ -2505,6 +2505,7 @@ static int airoha_alloc_gdm_port(struct airoha_eth *eth,
 			   NETIF_F_SG | NETIF_F_TSO |
 			   NETIF_F_HW_TC;
 	dev->features |= dev->hw_features;
+	dev->vlan_features = dev->hw_features;
 	dev->dev.of_node = np;
 	dev->irq = qdma->irq;
 	SET_NETDEV_DEV(dev, eth->dev);