staging: bcm2835-audio: Drop superfluous ioctl PCM ops

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/20191210141356.18074-5-tiwai@suse.deSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vc04_services/bcm2835-audio/bcm2835-pcm.c

@@ -305,7 +305,6 @@ snd_bcm2835_pcm_pointer(struct snd_pcm_substream *substream)
 static const struct snd_pcm_ops snd_bcm2835_playback_ops = {
 	.open = snd_bcm2835_playback_open,
 	.close = snd_bcm2835_playback_close,
-	.ioctl = snd_pcm_lib_ioctl,
 	.prepare = snd_bcm2835_pcm_prepare,
 	.trigger = snd_bcm2835_pcm_trigger,
 	.pointer = snd_bcm2835_pcm_pointer,
@@ -315,7 +314,6 @@ static const struct snd_pcm_ops snd_bcm2835_playback_ops = {
 static const struct snd_pcm_ops snd_bcm2835_playback_spdif_ops = {
 	.open = snd_bcm2835_playback_spdif_open,
 	.close = snd_bcm2835_playback_close,
-	.ioctl = snd_pcm_lib_ioctl,
 	.prepare = snd_bcm2835_pcm_prepare,
 	.trigger = snd_bcm2835_pcm_trigger,
 	.pointer = snd_bcm2835_pcm_pointer,