ASoC: xtensa: 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/xtensa/xtfpga-i2s.c

@@ -469,9 +469,9 @@ static int xtfpga_pcm_new(struct snd_soc_pcm_runtime *rtd)
 	struct snd_card *card = rtd->card->snd_card;
 	size_t size = xtfpga_pcm_hardware.buffer_bytes_max;
 
-	return snd_pcm_lib_preallocate_pages_for_all(rtd->pcm,
-						     SNDRV_DMA_TYPE_DEV,
-						     card->dev, size, size);
+	snd_pcm_lib_preallocate_pages_for_all(rtd->pcm, SNDRV_DMA_TYPE_DEV,
+					      card->dev, size, size);
+	return 0;
 }
 
 static const struct snd_pcm_ops xtfpga_pcm_ops = {