ASoC: dt-bindings: renesas,rsnd.yaml: enable multi ports for multi Component support

To enable multi Component support, "multi ports" is needed for Audio Graph
Card/Card2, and "multi rcar_sound,dai" is needed for Simple Audio Card.
This patch enable these.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87r0oyb1li.wl-kuninori.morimoto.gx@renesas.com


Signed-off-by: Mark Brown <broonie@kernel.org>