net: sparx5: Use vid 1 when bridge default vid 0 to avoid collision

Standalone ports use vid 0. Let the bridge use vid 1 when
"vlan_default_pvid 0" is set to avoid collisions. Since no
VLAN is created when default pvid is 0 this is set
at "PORT_ATTR_SET" and handled in the Switchdev fdb handler.

Signed-off-by: Casper Andersson <casper.casan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>