net/mlx5e: CT: Support restore ipv6 tunnel

Currently the driver restores only IPv4 tunnel headers.
Add support for restoring IPv6 tunnel header.

Fixes: b8ce9037

 ("net/mlx5e: Restore tunnel metadata on miss")
Signed-off-by: Jianbo Liu <jianbol@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Reviewed-by: Oz Shlomo <ozsh@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>