ASoC: xilinx: Drop superfluous ioctl PCM ops

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

Cc: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/20191210145406.21419-21-tiwai@suse.deSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/xilinx/xlnx_formatter_pcm.c

@@ -543,7 +543,6 @@ static const struct snd_soc_component_driver xlnx_asoc_component = {
 	.name		= DRV_NAME,
 	.open		= xlnx_formatter_pcm_open,
 	.close		= xlnx_formatter_pcm_close,
-	.ioctl		= snd_soc_pcm_lib_ioctl,
 	.hw_params	= xlnx_formatter_pcm_hw_params,
 	.hw_free	= xlnx_formatter_pcm_hw_free,
 	.trigger	= xlnx_formatter_pcm_trigger,