net/mlx5: fix duplicate pattern option default

net/mlx5: fix duplicate pattern option default

In order to allow/disallow configuring rules with identical patterns,
the new device argument 'allow_duplicate_pattern' was introduced.

The default is to allow, and it is initialized to 1 in PCI probe
function.
However, on auxiliary bus probing (for Sub-Function) it is not
initialized at all, so it's actually initialized to 0.

Move the initialization to default config function which is called from
both.

Fixes: 919488fbfa71 ("net/mlx5: support Sub-Function")
Cc: stable@dpdk.org
Signed-off-by: Michael Baum <michaelba@nvidia.com>
Acked-by: Matan Azrad <matan@nvidia.com>