Merge tag 'phy-qcom-sgmii-eth-add-set_mode-and-validate-methods'

net: stmmac: qcom-ethqos: further serdes reorganisation [part]

First PHY patch of Russell's series. Vladimir will need this
to avoid a conflict with his work.

Link: https://patch.msgid.link/aaDSJAc-x2-klvHJ@shell.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>