ASoC: stm: Drop superfluous PCM preallocation error checks

snd_pcm_lib_preallocate_pages() and co always succeed, so the error
check is simply redundant.  Drop it.
Reviewed-by: Jaroslav Kysela <perex@perex.cz>
Acked-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/soc/stm/stm32_adfsdm.c

@@ -262,8 +262,9 @@ static int stm32_adfsdm_pcm_new(struct snd_soc_pcm_runtime *rtd)
 		snd_soc_dai_get_drvdata(rtd->cpu_dai);
 	unsigned int size = DFSDM_MAX_PERIODS * DFSDM_MAX_PERIOD_SIZE;
 
-	return snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
-						     priv->dev, size, size);
+	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
+					      priv->dev, size, size);
+	return 0;
 }
 
 static void stm32_adfsdm_pcm_free(struct snd_pcm *pcm)