MMC: S3C24XX: Fix s3c2410_dma_request() return code check.

The driver should be checking for a negative error code from
s3c2410_dma_request(), not non-zero. Newer kernels now return
the DMA channel number that was allocated by the request.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

drivers/mmc/host/s3cmci.c

@@ -1215,7 +1215,7 @@ static int __devinit s3cmci_probe(struct platform_device *pdev, int is2440)
 		s3c2410_gpio_cfgpin(host->pdata->gpio_wprotect,
 				    S3C2410_GPIO_INPUT);
 
-	if (s3c2410_dma_request(S3CMCI_DMA, &s3cmci_dma_client, NULL)) {
+	if (s3c2410_dma_request(S3CMCI_DMA, &s3cmci_dma_client, NULL) < 0) {
 		dev_err(&pdev->dev, "unable to get DMA channel.\n");
 		ret = -EBUSY;
 		goto probe_free_irq_cd;