ASoC: test-component: add Test Component YAML bindings

This patch adds test-component sound device YAML bindings.
It can be used for Sound Test/Debug.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/878ryyn8s4.wl-kuninori.morimoto.gx@renesas.com


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