ASoC: fsl_sai: Use 'np' variable

The 'np' variable is already assigned to 'pdev->dev.of_node', so use
it to improve readability.

No functional change.

Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/fsl/fsl_sai.c

@@ -801,8 +801,8 @@ static int fsl_sai_probe(struct platform_device *pdev)
 
 	sai->pdev = pdev;
 
-	if (of_device_is_compatible(pdev->dev.of_node, "fsl,imx6sx-sai") ||
-	    of_device_is_compatible(pdev->dev.of_node, "fsl,imx6ul-sai"))
+	if (of_device_is_compatible(np, "fsl,imx6sx-sai") ||
+	    of_device_is_compatible(np, "fsl,imx6ul-sai"))
 		sai->sai_on_imx = true;
 
 	sai->is_lsb_first = of_property_read_bool(np, "lsb-first");
@@ -883,7 +883,7 @@ static int fsl_sai_probe(struct platform_device *pdev)
 	}
 
 	if (of_find_property(np, "fsl,sai-mclk-direction-output", NULL) &&
-	    of_device_is_compatible(pdev->dev.of_node, "fsl,imx6ul-sai")) {
+	    of_device_is_compatible(np, "fsl,imx6ul-sai")) {
 		gpr = syscon_regmap_lookup_by_compatible("fsl,imx6ul-iomuxc-gpr");
 		if (IS_ERR(gpr)) {
 			dev_err(&pdev->dev, "cannot find iomuxc registers\n");