ASoC: fsl_spdif: Fix unnecessary check in fsl_spdif_probe()

The function fsl_spdif_probe() is only called with an openfirmware
platform device. Therefore there is no need to check that the passed
in device is NULL.
Signed-off-by: Zhang Shengju <zhangshengju@cmss.chinamobile.com>
Signed-off-by: Tang Bin <tangbin@cmss.chinamobile.com>
Link: https://lore.kernel.org/r/20200826150918.16116-1-tangbin@cmss.chinamobile.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/fsl/fsl_spdif.c

@@ -1259,9 +1259,6 @@ static int fsl_spdif_probe(struct platform_device *pdev)
 	void __iomem *regs;
 	int irq, ret, i;
 
-	if (!np)
-		return -ENODEV;
-
 	spdif_priv = devm_kzalloc(&pdev->dev, sizeof(*spdif_priv), GFP_KERNEL);
 	if (!spdif_priv)
 		return -ENOMEM;