net: dsa: mv88e6xxx: enable .port_set_policy() on Topaz

Commit f3a2cd32 ("net: dsa: mv88e6xxx: introduce .port_set_policy")
introduced .port_set_policy() method with implementation for several
models, but forgot to add Topaz, which can use the 6352 implementation.

Use the 6352 implementation of .port_set_policy() on Topaz.

Signed-off-by: Marek Behún <kabel@kernel.org>
Fixes: f3a2cd32 ("net: dsa: mv88e6xxx: introduce .port_set_policy")
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>