ALSA: sh: 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/20191209094943.14984-62-tiwai@suse.deSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/sh/sh_dac_audio.c

@@ -125,18 +125,6 @@ static int snd_sh_dac_pcm_close(struct snd_pcm_substream *substream)
 	return 0;
 }
 
-static int snd_sh_dac_pcm_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_sh_dac_pcm_hw_free(struct snd_pcm_substream *substream)
-{
-	return snd_pcm_lib_free_pages(substream);
-}
-
 static int snd_sh_dac_pcm_prepare(struct snd_pcm_substream *substream)
 {
 	struct snd_sh_dac *chip = snd_pcm_substream_chip(substream);
@@ -241,8 +229,6 @@ static const struct snd_pcm_ops snd_sh_dac_pcm_ops = {
 	.open		= snd_sh_dac_pcm_open,
 	.close		= snd_sh_dac_pcm_close,
 	.ioctl		= snd_pcm_lib_ioctl,
-	.hw_params	= snd_sh_dac_pcm_hw_params,
-	.hw_free	= snd_sh_dac_pcm_hw_free,
 	.prepare	= snd_sh_dac_pcm_prepare,
 	.trigger	= snd_sh_dac_pcm_trigger,
 	.pointer	= snd_sh_dac_pcm_pointer,
@@ -267,10 +253,8 @@ static int snd_sh_dac_pcm(struct snd_sh_dac *chip, int device)
 	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_sh_dac_pcm_ops);
 
 	/* buffer size=48K */
-	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
-					      NULL,
-							48 * 1024,
-							48 * 1024);
+	snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
+				       NULL, 48 * 1024, 48 * 1024);
 
 	return 0;
 }