net: dsa: mv88e6xxx: enable PVT for 6321 switch

commit f85c6936 upstream.

Commit f3645652 ("net: dsa: mv88e6xxx: move PVT description in
info") did not enable PVT for 6321 switch. Fix it.

Fixes: f3645652 ("net: dsa: mv88e6xxx: move PVT description in info")
Signed-off-by: Marek Behún <kabel@kernel.org>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20250317173250.28780-4-kabel@kernel.org


Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>