r8169: support L1.2 control on RTL8168h

According to Realtek RTL8168h supports the same L1.2 control as RTL8125.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Link: https://lore.kernel.org/r/4784d5ce-38ac-046a-cbfa-5fdd9773f820@gmail.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>