build/altera/common,platform: added ddrinput/ddrout primitives

[trabucayre]

For Agilex5 ALTDDIO_OUT and ALTDDIO_IN are not supported, and replaced by tennm_ph2_ddio_out and tennm_ph2_ddio_in (according to plaform designer generated code).

This PR is not fully tested due to errors at build time:

Error (23098): One or more blocks are configured incorrectly and will not have the desired functionality. --BCM instance name: hvio_0_1                                                                                                                                                                                        
Error (12274): A critical error occurred while the periphery placement was committed to the atom netlist. The atom netlist is now invalid and the Fitter must be restarted.                                                                                                                                                    

[enjoy-digital]

Thanks @trabucayre, let's merge and eventually update when the build issue will be fixed (if related).