net/mlx5e: Remove double defined DMAC header re-write element

The firmware DMAC_47_16 header re-write token was defined twice,
clean it up.

Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Reported-by: Jianbo Liu <jianbol@mellanox.com>
Reviewed-by: Jianbo Liu <jianbol@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

drivers/net/ethernet/mellanox/mlx5/core/en_tc.c

@@ -1579,7 +1579,6 @@ struct mlx5_fields {
 		{MLX5_ACTION_IN_FIELD_OUT_ ## fw_field, size, offsetof(struct pedit_headers, field) + (off)}
 
 static struct mlx5_fields fields[] = {
-	OFFLOAD(DMAC_47_16, 4, eth.h_dest[0], 0),
 	OFFLOAD(DMAC_47_16, 4, eth.h_dest[0], 0),
 	OFFLOAD(DMAC_15_0,  2, eth.h_dest[4], 0),
 	OFFLOAD(SMAC_47_16, 4, eth.h_source[0], 0),