OK. Just simple rule.
ethernet@2310000 is defined in tegra234-base-overlay.dtsi and then included by tegra234-p3737-0000+p3701-xxxx-nv-common.dtsi, so your previous setting would be overwritten.
It would always be better to put status change in the last layer of your dts.
The previous layer would be more like a general setting for all the platforms on same SoC.