ice: extend dump serdes equalizer values feature

Extend the work done in commit 70838938 ("ice: Implement driver
functionality to dump serdes equalizer values") by adding the new set of
Rx registers that can be read using command:
  $ ethtool -d interface_name

Rx equalization parameters are E810 PHY registers used by end user to
gather information about configuration and status to debug link and
connection issues in the field.

Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Signed-off-by: Mateusz Polchlopek <mateusz.polchlopek@intel.com>
Tested-by: Pucha Himasekhar Reddy <himasekharx.reddy.pucha@intel.com> (A Contingent worker at Intel)
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>