net/mlx5: fix VXLAN device rollback if rule apply fails

net/mlx5: fix VXLAN device rollback if rule apply fails

If rule contains tunneling action (like VXLAN encapsulation)
the VTEP (Virtual Tunneling EndPoint) device is pre-configured
before applying the rule. If kernel returns an error this
VTEP configuration should be rolled back to the origin state.
The patch adds the missing VTEP configuration restoration.

Fixes: 95a464cecc21 ("net/mlx5: add E-switch VXLAN tunnel devices management")
Signed-off-by: Viacheslav Ovsiienko <viacheslavo@mellanox.com>
Acked-by: Shahaf Shuler <shahafs@mellanox.com>
Acked-by: Yongseok Koh <yskoh@mellanox.com>