net/mlx5: fix crash in tunnel offload setup

net/mlx5: fix crash in tunnel offload setup

The new flow table resource management API triggered a PMD crash in
tunnel offload mode, when tunnel match flow rule was inserted before
tunnel set rule.

Reason for the crash was double flow table registration. The table was
registered by the tunnel offload code for the first time and once
more by PMD code, as part of general table processing. The table
counter was decremented only once during the rule destruction and
caused a resource leak that triggered the crash.

The patch updates PMD registration with tunnel offload parameters and
removes table registration in tunnel related code.

Fixes: afd7a62514ad ("net/mlx5: make flow table cache thread safe")

Signed-off-by: Gregory Etelson <getelson@nvidia.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo@nvidia.com>