AM6411: Clause 45 support

Hello,

I try to enable Clause 45 support via sysconfig for our custom board but the software keeps failing and debug print on terminal states "Clause 45 is not supported".

According to the reference manual CPSW supports both clause 22 and clause 45, but single stepping through the code I found the following in mdio.c, line 233:

    if (mdioCfg->c45EnMask != ENET_MDIO_PHY_ADDR_MASK_NONE)
    {
        status = ENET_ENOTSUPPORTED;
        ENETTRACE_WARN("MDIO Clause 45 is not supported\n");
    }

Thank you for your help,

Paolo Mattachini