arm64: dts: allwinner: a64: Add SPDIF to the Pine64

The S/PDIF transmitter can be reached on the Euler connector.
But as this is a GPIO then leave it disabled so that an overlay
can override the status property.

Signed-off-by: Marcus Cooper <codekipper@gmail.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

arch/arm64/boot/dts/allwinner/sun50i-a64-pine64.dts

@@ -230,6 +230,11 @@
 	regulator-name = "vcc-rtc";
 };
 
+/* On Euler connector */
+&spdif {
+	status = "disabled";
+};
+
 /* On Exp and Euler connectors */
 &uart0 {
 	pinctrl-names = "default";