ASoC: uniphier: 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/uniphier/aio-dma.c

@@ -235,10 +235,11 @@ static int uniphier_aiodma_new(struct snd_soc_pcm_runtime *rtd)
 	if (ret)
 		return ret;
 
-	return snd_pcm_lib_preallocate_pages_for_all(pcm,
+	snd_pcm_lib_preallocate_pages_for_all(pcm,
 		SNDRV_DMA_TYPE_DEV, dev,
 		uniphier_aiodma_hw.buffer_bytes_max,
 		uniphier_aiodma_hw.buffer_bytes_max);
+	return 0;
 }
 
 static void uniphier_aiodma_free(struct snd_pcm *pcm)