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AM5728: How to use eth1 instead of eth0 in AM5728 Uboot

Part Number: AM5728

The BSP I use is "PROCESSOR-SDK-LINUX-AM57X 06_03_00_106", I now want to implement tftp under uboot to load zImage on the server, but when I try to ping Ubuntu, uboot will automatically select the eth0 (RGMII0) network card, but we The product only leads to eth1 (RGMII1), how can I modify it in uboot to switch to the eth1 network card of AM5728

Thank you