net/mlx5e: Eliminate a compilation warning

hulk inclusion
category: bugfix
bugzilla: 51531
CVE: NA

-------------------------------------------------------------------------

The local variable 'ret' is unused now.

drivers/net/ethernet/mellanox/mlx5/core/en_tc.c: In function ‘mlx5e_route_lookup_ipv6’:
drivers/net/ethernet/mellanox/mlx5/core/en_tc.c:2220:6: warning: unused variable ‘ret’ [-Wunused-variable]
  int ret;
      ^~~

Fixes: 3d5b4d0ecbe7 ("net: ipv6_stub: use ip6_dst_lookup_flow instead of ip6_dst_lookup")
Signed-off-by: NZhen Lei <thunder.leizhen@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>

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

@@ -2217,7 +2217,6 @@ static int mlx5e_route_lookup_ipv6(struct mlx5e_priv *priv,
 #if IS_ENABLED(CONFIG_INET) && IS_ENABLED(CONFIG_IPV6)
 	struct mlx5e_rep_priv *uplink_rpriv;
 	struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
-	int ret;
 
 	dst = ipv6_stub->ipv6_dst_lookup_flow(dev_net(mirred_dev), NULL, fl6,
 					      NULL);