ASoC: dmic: don't use codec anymore

commit 6d6c3946 ("ASoC: dmic: replace codec to component")
replaced codec to component, but
commit 05c9b302 ("ASoC: dmic: Add optional wakeup delay")
used codec again. This patch fix it up.

Fixes: 05c9b302

 ("ASoC: dmic: Add optional wakeup delay")
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>