Import commits from upstream Linux replacing some downstream patches.
Move accepted patches from pending-{5.15,6.1} to backport-{5.15,6.1}.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
(cherry picked from commit f631c7bbb16f1d39d59c4cdf3f7189abab4fd9c6)
Replace patches for MediaTek Ethernet driver SGMII/SerDes unit with
their corresponding upstream patches. Not all of the patches in our
tree went upstream as-is, some are slightly different implementations,
and they require the phylink_pcs helpers now made available.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>