net/mlx5: fix device scan within switch domain

net/mlx5: fix device scan within switch domain

In LAG configuration the devices in the same switch domain
might be spawned on the base of different PCI devices, so
we should check all devices backed by mlx5 PMD whether they
belong to specified switch domain. When the new devices are
being created it is not possible to detect whether the
sibling devices created in the current probe() loop belong
to the driver, driver field is not filled yet (it will be
done on returned success of current probe()). This patch
updates the device scanning, allowing extra match on
current backing PCI device, is being used to create siblings.

Fixes: f7e95215ac7c ("net/mlx5: extend switch domain searching range")

Signed-off-by: Viacheslav Ovsiienko <viacheslavo@mellanox.com>