[ONME-2734] Autonegotiation Timeout Fix

[hasnainvirk]

Issue was raised due to autonegotiation timeout if the cable was not connected. The API call for initializing ETH PHY in KSDK2.0 was doing the initialization and Autonegotiation at the same time, and if the cable was not connected, it would enter a loop with a large timeout (30s).

• Rather than a KSDK2.0 API call to initialize PHY layer, initialization and Autonegotiation are done locally.
• The rationale is that we do autonegotiation only when the cable is connected.

[hasnainvirk]

@kjbracey-arm , @artokin , @SeppoTakalo