Merge branch 'RTL8125-EEE'

Heiner Kallweit says:

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net: phy: realtek: support NBase-T MMD EEE registers on RTL8125

Add missing EEE-related constants, including the new MMD EEE registers
for NBase-T / 802.3bz. Based on that emulate the new 802.3bz MMD EEE
registers for 2.5Gbps EEE on RTL8125.
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Signed-off-by: David S. Miller <davem@davemloft.net>