ASoC: amd: pcm-dma: Fix signedness bug in acp_pdm_audio_probe()

The "adata->pdm_irq" variable is unsigned so the error handling will
not work.

Fixes: 87d71a12 ("ASoC: amd: pcm-dma: Use platform_get_irq() to get the interrupt")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20220304131335.GB28739@kiliSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/amd/renoir/acp3x-pdm-dma.c

@@ -399,9 +399,10 @@ static int acp_pdm_audio_probe(struct platform_device *pdev)
 	if (!adata->acp_base)
 		return -ENOMEM;
 
-	adata->pdm_irq = platform_get_irq(pdev, 0);
-	if (adata->pdm_irq < 0)
-		return -ENODEV;
+	status = platform_get_irq(pdev, 0);
+	if (status < 0)
+		return status;
+	adata->pdm_irq = status;
 
 	adata->capture_stream = NULL;