ASoC: mediatek: mt6359: Fix DT parse error due to wrong child node name

commit 79c080c upstream.

A recent dtbs_check error fix in mt6359.dtsi file changed a node name
(from "mt6359codec" to "audio-codec") without modifying the mt6539
codec code that uses it.
It leads to a probe failure after devicetree parsing returns in error:
```
[    1.354025] mt6359-sound mt6359-sound: mt6359_platform_driver_probe() failed to parse dts
[    1.355066] mt6359-sound mt6359-sound: probe with driver mt6359-sound failed with error -22
```

So, add the child node retrieval with the new name and if not found,
try with the older one for backward compatibility.

Fixes: 76b35f5 ("arm64: dts: mediatek: mt6359: fix dtbs_check error for audio-codec")
Signed-off-by: Louis-Alexis Eyraud <louisalexis.eyraud@collabora.com>
Reviewed-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Link: https://patch.msgid.link/20250228-mt6359-fix-probe-failed-v1-1-64941d387b2c@collabora.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: laeyraud

sound/soc/codecs/mt6359.c

@@ -2867,9 +2867,12 @@ static int mt6359_parse_dt(struct mt6359_priv *priv)
 	struct device *dev = priv->dev;
 	struct device_node *np;
 
-	np = of_get_child_by_name(dev->parent->of_node, "mt6359codec");
-	if (!np)
-		return -EINVAL;
+	np = of_get_child_by_name(dev->parent->of_node, "audio-codec");
+	if (!np) {
+		np = of_get_child_by_name(dev->parent->of_node, "mt6359codec");
+		if (!np)
+			return -EINVAL;
+	}
 
 	ret = of_property_read_u32(np, "mediatek,dmic-mode",
 				   &priv->dmic_one_wire_mode);