net/mlx5: fix masks of encap and decap actions

net/mlx5: fix masks of encap and decap actions

PUSH_VLAN and POP_VLAN actions flags were added to ENCAP_ACTIONS
and DECAP_ACTIONS bit masks, respectively.
This is incorrect, because VLAN actions are considered as 'modify
header' actions, not as 'packet reformat' actions.

This patch removes the PUSH_VLAN and POP_VLAN actions flags from
ENCAP_ACTIONS and DECAP_ACTIONS bit masks.

Fixes: 9aee7a8418d4 ("net/mlx5: support push flow action on VLAN header")
Fixes: b41e47da2592 ("net/mlx5: support pop flow action on VLAN header")
Cc: stable@dpdk.org
Signed-off-by: Dekel Peled <dekelp@mellanox.com>
Acked-by: Ori Kam <orika@mellanox.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo@mellanox.com>