net: dsa: b53: b53_arl_read{,25}(): use the entry for comparision

net: dsa: b53: b53_arl_read{,25}(): use the entry for comparision

[ Upstream commit a6e4fd38bf2f2e2363b61c27f4e6c49b14e4bb07 ]

Align the b53_arl_read{,25}() functions by consistently using the
parsed arl entry instead of parsing the raw registers again.

Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Link: https://patch.msgid.link/20251107080749.26936-2-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>