feat(eth0): add MAE0621A phy support

lin

2025-07-30 fcd736bf35fd93b563e9bbf594f2aa7b62028cc9

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# Default maintainers and code reviewers:
estebandlc@google.com
shiufai@google.com
mosescu@google.com
allight@google.com
yiyiyang@google.com