ice: refactor ice_sbq_msg_dev enum

Rename ice_sbq_msg_dev to ice_sbq_dev_id to reflect the meaning of this
type more precisely. This enum type describes RDA (Remote Device Access)
client ids, accessible over SB (Side Band) interface.
Rename enum elements to make a driver namespace more cleaner and
consistent with other definitions within SB
Remove unused 'rmn_x' entries, specific to unsupported E824 device.
Adjust clients '2' and '13' names (phy_0 and phy_0_peer respectively) to
be compliant with EAS doc. According to the specification, regardless of
the complex entity (single or dual), when accessing its own ports,
they're accessed always as 'phy_0' client. And referred as 'phy_0_peer'
when handling ports connected to the other complex.

Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Signed-off-by: Karol Kolacinski <karol.kolacinski@intel.com>
Co-developed-by: Grzegorz Nitka <grzegorz.nitka@intel.com>
Signed-off-by: Grzegorz Nitka <grzegorz.nitka@intel.com>
Tested-by: Rinitha S <sx.rinitha@intel.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>