net: dsa: b53: add support for 5389/5397/5398 ARL entry format

net: dsa: b53: add support for 5389/5397/5398 ARL entry format

BCM5389, BCM5397 and BCM5398 use a different ARL entry format with just
a 16 bit fwdentry register, as well as different search control and data
offsets.

So add appropriate ops for them and switch those chips to use them.

Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Link: https://patch.msgid.link/20251107080749.26936-8-jonas.gorski@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>