ALSA: ad1816a: Use managed buffer allocation

Clean up the driver with the new managed buffer allocation API.
The hw_params and hw_free callbacks became superfluous and got
dropped.

Link: https://lore.kernel.org/r/20191209094943.14984-11-tiwai@suse.deSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/isa/ad1816a/ad1816a_lib.c

@@ -206,17 +206,6 @@ static int snd_ad1816a_capture_trigger(struct snd_pcm_substream *substream, int
 				   SNDRV_PCM_STREAM_CAPTURE, cmd, 1);
 }
 
-static int snd_ad1816a_hw_params(struct snd_pcm_substream *substream,
-				 struct snd_pcm_hw_params *hw_params)
-{
-	return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
-}
-
-static int snd_ad1816a_hw_free(struct snd_pcm_substream *substream)
-{
-	return snd_pcm_lib_free_pages(substream);
-}
-
 static int snd_ad1816a_playback_prepare(struct snd_pcm_substream *substream)
 {
 	struct snd_ad1816a *chip = snd_pcm_substream_chip(substream);
@@ -645,8 +634,6 @@ static const struct snd_pcm_ops snd_ad1816a_playback_ops = {
 	.open =		snd_ad1816a_playback_open,
 	.close =	snd_ad1816a_playback_close,
 	.ioctl =	snd_pcm_lib_ioctl,
-	.hw_params =	snd_ad1816a_hw_params,
-	.hw_free =	snd_ad1816a_hw_free,
 	.prepare =	snd_ad1816a_playback_prepare,
 	.trigger =	snd_ad1816a_playback_trigger,
 	.pointer =	snd_ad1816a_playback_pointer,
@@ -656,8 +643,6 @@ static const struct snd_pcm_ops snd_ad1816a_capture_ops = {
 	.open =		snd_ad1816a_capture_open,
 	.close =	snd_ad1816a_capture_close,
 	.ioctl =	snd_pcm_lib_ioctl,
-	.hw_params =	snd_ad1816a_hw_params,
-	.hw_free =	snd_ad1816a_hw_free,
 	.prepare =	snd_ad1816a_capture_prepare,
 	.trigger =	snd_ad1816a_capture_trigger,
 	.pointer =	snd_ad1816a_capture_pointer,
@@ -680,8 +665,7 @@ int snd_ad1816a_pcm(struct snd_ad1816a *chip, int device)
 	strcpy(pcm->name, snd_ad1816a_chip_id(chip));
 	snd_ad1816a_init(chip);
 
-	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
-					      chip->card->dev,
+	snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV, chip->card->dev,
 				       64*1024, chip->dma1 > 3 || chip->dma2 > 3 ? 128*1024 : 64*1024);
 
 	chip->pcm = pcm;