net/mlx5: allow implicit LRO flow

net/mlx5: allow implicit LRO flow

When a user configures LRO in the port offloads, he probably wants each
TCP packet will have a chance to open an LRO session.

The PMD wasn't configure LRO in the flow TIR if the flow is not
explicitly configured TCP item despite the flow included TCP traffic.

For example, the next flows were not LRO offloaded:
pattern eth / end, pattern eth / ip / end, pattern eth / ipv6 / end.

Enable LRO configuration for all the TIRs if LRO is configured in the
port.

No performance impact for non-LRO traffic in these TIRs.

Signed-off-by: Matan Azrad <matan@mellanox.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo@mellanox.com>