set/get speed/duplex on 2.5GBE PHY
Implement setter/getter for parameters for Realtek PHY. I'll try to replace this with a proper PHYLIB integration in the ae_wan and hsgmii_lan drivers.
Please note that this depends on airoha!67
Change-Id: I37e7fcbb377663724c2ff5aa071fb2c93cade90f
Edited by Markus Gothe