ASoC: audio-graph-card2: expand dai_link property part

Current dai_link related property are parsed and enabled only on CPU
port node (A)(b)(c). OTOH, Audio Graph Card2 supports many connections
like Multi-CPU, DPCM, Codec2Codec today. For example in Multi-CPU case,
it will be checked via (X) -> (B) -> (b) process, but (X) / (B) part
property is not parsed.

>From dai_link related settings point of view, (B) (C) part and Codec
port also enabled is more viscerally understandable, and useful.

	card2 {
(X)		links = <&snd-cpu	(A)
			 &snd-multi	(B)
			 &snd-dpcm	(C)
			 ...>

		multi {
			ports {
(B)				snd-multi: port { ... };
				...
			};
		};
		dpcm {
			ports {
(C)				snd-dpcm: port { ... };
				...
			};
		};
		codec2codec {
			...
		};
	};

	cpu_device {
		ports {
(A)			snd-cpu: port { ... };
(b)			mcpu:    port { ... };
(c)			dcpu:    port { ... };
		}
	};

One note here is that if it was Multi-CPU/Codec case, 1st port only
enabled to have property it.

Signed-off-by: Kuninori Morimoto <[email protected]>
Link: https://msgid.link/r/[email protected]
Signed-off-by: Mark Brown <[email protected]>

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