airoha: an7583: fix ethernet breakage on Nokia XG-040G-MF

airoha: an7583: fix ethernet breakage on Nokia XG-040G-MF

Recent upstream cleanups moved switch port labels to the board level and
disabled switch ports/PHYs by default on the AN7583 SoC dtsi. This broke
ethernet on the Nokia XG-040G-MF since its board DTS was not updated to
explicitly configure and enable them.

Fix this by explicitly enabling gsw_port2-4 along with their respective
PHYs and restoring the "lan2", "lan3", and "lan4" port labels.

Fixes: ce55cdde26a9 ("airoha: an7583: move the switch port label from soc-level to board-level")
Fixes: d2698d325b68 ("airoha: an7583: disable all switch ports and PHYs by default")
Signed-off-by: Mikhail Zhilkin <csharper2005@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/24606
Signed-off-by: Robert Marko <robimarko@gmail.com>