Merge branch 'remove-legacy-phylink-behaviour'

Russell King says:

====================
Remove legacy phylink behaviour

This series removes the - as far as I can tell - unreachable code in
mtk_eth_soc that relies upon legacy phylink behaviour, and then removes
the support in phylink for this legacy behaviour.

Patch 1 removes the clocking configuration from mtk_eth_soc for non-
TRGMII, non-serdes based interface modes, and disables those interface
modes prior to phylink configuration.

Patch 2 removes the mac_pcs_get_state() method from mtk_eth_soc which
I believe is also not used - mtk_eth_soc appears not to be used with
SFPs (which would use a kind of in-band mode) nor does any DT appear
to specify in-band mode for any non-serdes based interface mode.

With both of those dealt with, the kernel is now free of any driver
relying on the phylink legacy mode. Therefore, patch 3 removes support
for this.

Finally, with the advent of a new driver being submitted today that
makes use of state->speed in the mac_config() path, patch 4 ensures that
any phylink_link_state member that should not be used in mac_config is
either cleared or set to an invalid value.
====================

Link: https://lore.kernel.org/r/ZLw8DoRskRXLQK37@shell.armlinux.org.uk
Signed-off-by: Paolo Abeni <pabeni@redhat.com>