ASoC: soc-utils.c: add asoc_dummy_dlc

ASoC uses dummy Component, sharing snd_soc_dai_link_component
for it is better idea. This patch adds it.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87a5yy0zyk.wl-kuninori.morimoto.gx@renesas.com


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