generic: 6.12: backport b53 patches from netdev-next

generic: 6.12: backport b53 patches from netdev-next

These patches have been accepted in netdev-next for linux v6.19.

2b3013ac0302 net: dsa: b53: add support for bcm63xx ARL entry format
300f78e8b6b7 net: dsa: b53: add support for 5389/5397/5398 ARL entry format
a7e73339ad46 net: dsa: b53: move ARL entry functions into ops struct
e0c476f325a8 net: dsa: b53: split reading search entry into their own functions
1716be6db04a net: dsa: b53: provide accessors for accessing ARL_SRCH_CTL
bf6e9d2ae1db net: dsa: b53: move writing ARL entries into their own functions
4a291fe72267 net: dsa: b53: move reading ARL entries into their own function
a6e4fd38bf2f net: dsa: b53: b53_arl_read{,25}(): use the entry for comparision

Signed-off-by: Álvaro Fernández Rojas <[email protected]>