[ALSA] soc - fix s3c2410 PCM breakage

S3C2410 pcm doesn't work.
s3c2410_dma_request() now returns the channel number and not 0 if OK.
Signed-off-by: Davide Rizzo <davide@elpa.it>
Acked-by: Liam Girdwood <lg@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/soc/s3c24xx/s3c24xx-pcm.c

@@ -171,7 +171,7 @@ static int s3c24xx_pcm_hw_params(struct snd_pcm_substream *substream,
 		ret = s3c2410_dma_request(prtd->params->channel,
 					  prtd->params->client, NULL);
 
-		if (ret) {
+		if (ret < 0) {
 			DBG(KERN_ERR "failed to get dma channel\n");
 			return ret;
 		}