ASoC: sprd: Drop superfluous ioctl PCM ops

ASoC PCM core deals the empty ioctl field now as default.
Let's kill the redundant lines.

Cc: Orson Zhai <orsonzhai@gmail.com>
Cc: Baolin Wang <baolin.wang7@gmail.com>
Cc: Chunyan Zhang <zhang.lyra@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Reviewed-by: Baolin Wang <baolin.wang7@gmail.com>
Link: https://lore.kernel.org/r/20191210145406.21419-18-tiwai@suse.deSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sprd/sprd-pcm-dma.c

@@ -508,7 +508,6 @@ static const struct snd_soc_component_driver sprd_soc_component = {
 	.name		= DRV_NAME,
 	.open		= sprd_pcm_open,
 	.close		= sprd_pcm_close,
-	.ioctl		= snd_soc_pcm_lib_ioctl,
 	.hw_params	= sprd_pcm_hw_params,
 	.hw_free	= sprd_pcm_hw_free,
 	.trigger	= sprd_pcm_trigger,