ASoC: dwc: Drop superfluous ioctl PCM ops

ASoC PCM core deals the empty ioctl field now as default.
Let's kill the redundant lines.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/20191210145406.21419-6-tiwai@suse.deSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/dwc/dwc-pcm.c

@@ -271,7 +271,6 @@ static void dw_pcm_free(struct snd_soc_component *component,
 static const struct snd_soc_component_driver dw_pcm_component = {
 	.open		= dw_pcm_open,
 	.close		= dw_pcm_close,
-	.ioctl		= snd_soc_pcm_lib_ioctl,
 	.hw_params	= dw_pcm_hw_params,
 	.hw_free	= dw_pcm_hw_free,
 	.trigger	= dw_pcm_trigger,