Since ddf94f7489 and 4a5de35dba, a SerDes is configured by the PCS
driver. All code from PHY and DSA related to this has been imported and
adjusted into the PCS driver. Thus, remove the unused code from the PHY
driver now.
Signed-off-by: Jonas Jelonek <jelonek.jonas@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/20494
Signed-off-by: Robert Marko <robimarko@gmail.com>