arm64: dts: uniphier: add interrupts to support card serial

Since commit e69f5dc6 ("dt-bindings: serial: Convert 8250 to
json-schema"), the schema for "ns16550a" is checked.

Since then, 'make ARCH=arm64 dtbs_check' is so noisy because the
required property 'interrupts' is missing.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

arch/arm64/boot/dts/socionext/uniphier-ld11-ref.dts

@@ -42,6 +42,10 @@ &ethsc {
 	interrupts = <0 8>;
 };
 
+&serialsc {
+	interrupts = <0 8>;
+};
+
 &serial0 {
 	status = "okay";
 };

arch/arm64/boot/dts/socionext/uniphier-ld20-ref.dts

@@ -42,6 +42,10 @@ &ethsc {
 	interrupts = <0 8>;
 };
 
+&serialsc {
+	interrupts = <0 8>;
+};
+
 &serial0 {
 	status = "okay";
 };

arch/arm64/boot/dts/socionext/uniphier-pxs3-ref.dts

@@ -43,6 +43,10 @@ &ethsc {
 	interrupts = <4 8>;
 };
 
+&serialsc {
+	interrupts = <4 8>;
+};
+
 &spi0 {
 	status = "okay";
 };