arm64: dts: allwinner: h6: Pine H64: Add interrupt line for RTC

The external PCF8563 RTC chip's interrupt line is connected to the NMI
line on the SoC.

Add the interrupt line to the device tree.

Fixes: 17ebc33a ("arm64: allwinner: h6: add PCF8563 RTC on Pine H64 board")
Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>
Signed-off-by: Chen-Yu Tsai <wens@csie.org>

arch/arm64/boot/dts/allwinner/sun50i-h6-pine-h64.dts

@@ -249,6 +249,8 @@ sw {
 	pcf8563: rtc@51 {
 		compatible = "nxp,pcf8563";
 		reg = <0x51>;
+		interrupt-parent = <&r_intc>;
+		interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
 		#clock-cells = <0>;
 	};
 };