Merge branch 'review/pse-pd-features-v2'

Kory Maincent:

This series adds support for several new features to the C33 PSE commands:
- Get the Class negotiated between the Powered Device and the PSE
- Get Extended state and substate
- Get the Actual power
- Configure the power limit
- Get the Power limit ranges available

It also updates the manual accordingly.

Example:
$ ethtool --set-pse eth1 c33-pse-avail-pw-limit 18000
$ ethtool --show-pse eth1
PSE attributes for eth1:
Clause 33 PSE Admin State: enabled
Clause 33 PSE Power Detection Status: disabled
Clause 33 PSE Extended State: Group of mr_mps_valid states
Clause 33 PSE Extended Substate: Port is not connected
Clause 33 PSE Available Power Limit: 18000
Clause 33 PSE Power Limit Ranges:
        range:
                min 15000
                max 18100
        range:
                min 30000
                max 38000
        range:
                min 60000
                max 65000
        range:
                min 90000
                max 97500

This series requisites the c33 PSE documentation support patch sent
mainline:
https://lore.kernel.org/r/20240911-fix_missing_doc-v2-1-e2eade6886b9@bootlin.com