ASoC: nuc900: Fix platform_get_irq() error checking some more

The error handling doesn't work here because "nuc900_audio->irq_num" is
unsigned.  Also we should be checking for < 0 and not <= 0 but I believe
that's harmless.  The platform_get_irq() comments don't talk about the
return values...

Fixes: fa8cc381 ("ASoC: nuc900: Fix platform_get_irq's error checking")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/nuc900/nuc900-ac97.c

@@ -345,11 +345,10 @@ static int nuc900_ac97_drvprobe(struct platform_device *pdev)
 		goto out;
 	}
 
-	nuc900_audio->irq_num = platform_get_irq(pdev, 0);
-	if (nuc900_audio->irq_num <= 0) {
-		ret = nuc900_audio->irq_num < 0 ? nuc900_audio->irq_num : -EBUSY;
+	ret = platform_get_irq(pdev, 0);
+	if (ret < 0)
 		goto out;
-	}
+	nuc900_audio->irq_num = ret;
 
 	nuc900_ac97_data = nuc900_audio;