feat(eth0): add MAE0621A phy support

lin

2025-07-30 fcd736bf35fd93b563e9bbf594f2aa7b62028cc9

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jyan@ca.ibm.com
dstence@us.ibm.com
joransiu@ca.ibm.com
mbrandy@us.ibm.com
michael_dawson@ca.ibm.com
jbarboza@ca.ibm.com
mmallick@ca.ibm.com