net: dsa: b53: move ARL entry functions into ops struct

net: dsa: b53: move ARL entry functions into ops struct

[ Upstream commit a7e73339ad46ade76d29fb6cc7d7854222608c26 ]

Now that the differences in ARL entry formats are neatly contained into
functions per chip family, wrap them into an ops struct and add wrapper
functions to access them.

Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Link: https://patch.msgid.link/20251107080749.26936-7-jonas.gorski@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Stable-dep-of: 8e46aacea426 ("net: dsa: b53: use same ARL search result offset for BCM5325/65")
Signed-off-by: Sasha Levin <sashal@kernel.org>