ASoC: imx-es8328: Fix of_node_put() call with uninitialized object

The of_node_put() calls in imx_es8328_probe() may take uninitialized
pointers when reached though the early error path.  This patch adds
the proper NULL initialization for fixing these.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/fsl/imx-es8328.c

@@ -78,7 +78,7 @@ static const struct snd_soc_dapm_widget imx_es8328_dapm_widgets[] = {
 static int imx_es8328_probe(struct platform_device *pdev)
 {
 	struct device_node *np = pdev->dev.of_node;
-	struct device_node *ssi_np, *codec_np;
+	struct device_node *ssi_np = NULL, *codec_np = NULL;
 	struct platform_device *ssi_pdev;
 	struct imx_es8328_data *data;
 	u32 int_port, ext_port;