ASoC: doc: dapm: fix struct name

struct snd_soc_codec_dai does not exist.

Reviewed-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Link: https://lore.kernel.org/r/20240426-dapm-docs-v2-2-87b07547eb5b@bootlin.com


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