ASoC: simple-card: sync support

Merge series from Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>:

We have simple-card / audio-graph / audio-graph2, basically these supports
same feature but is using different DT style.

Because we are using 3 drivers, some feature was added to one driver,
but other drivers doesn't have it. This patch set try to sync it on these
3 drivers.