bnxt_en: Link representors to PCI device

Link VF representors to parent PCI device to benefit from
systemd defined naming scheme.

Without this change the representor is visible as ethN.

Signed-off-by: Ivan Vecera <ivecera@redhat.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Reviewed-by: Michael Chan <michael.chan@broadcom.com>
Link: https://lore.kernel.org/r/20230620144855.288443-1-ivecera@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>