net: dsa: b53: allow VID 0 for BCM5325/65

net: dsa: b53: allow VID 0 for BCM5325/65

Now that writing ARL entries works properly, we can actually use VID 0
as the default untagged VLAN for BCM5325 and BCM5365 as well.

So use 0 as default PVID for all chips and do not reject VLAN 0 anymore,
which we ignored since commit 45e9d59d3950 ("net: dsa: b53: do not allow
to configure VLAN 0") anyway.

Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Link: https://patch.msgid.link/20251128080625.27181-8-jonas.gorski@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>