ixgbe: E610: add EEE support

ixgbe: E610: add EEE support

Add E610 specific implementation of .get_eee() and .set_eee() ethtool
callbacks.

Introduce ixgbe_setup_eee_e610() which is used to set EEE config
on E610 device via ixgbe_aci_set_phy_cfg() (0x0601 ACI command).
Assign it to dedicated mac operation.

E610 devices support EEE feature specifically for 2.5, 5 and 10G link
speeds. When user try to set EEE for unsupported speeds log it.

Setting timer and setting EEE advertised speeds are not yet supported.

EEE shall be enabled by default for E610 devices.

Add EEE statuis logging during link watchdog run.

Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Signed-off-by: Jedrzej Jagielski <jedrzej.jagielski@intel.com>
Tested-by: Rinitha S <sx.rinitha@intel.com>
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://patch.msgid.link/20260430-jk-iwl-net-next-2026-04-30-v1-6-6f27ae1cd073@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>