ARM: dts: uniphier: resync DT with Linux 5.9-rc1

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/arch/arm/dts/uniphier-pro4-ref.dts b/arch/arm/dts/uniphier-pro4-ref.dts
index 4967db5..3e1bc12 100644
--- a/arch/arm/dts/uniphier-pro4-ref.dts
+++ b/arch/arm/dts/uniphier-pro4-ref.dts
@@ -22,7 +22,7 @@
 		serial0 = &serial0;
 		serial1 = &serial1;
 		serial2 = &serial2;
-		serial3 = &serial3;
+		serial3 = &serialsc;
 		i2c0 = &i2c0;
 		i2c1 = &i2c1;
 		i2c2 = &i2c2;
@@ -43,6 +43,10 @@
 	interrupts = <2 8>;
 };
 
+&serialsc {
+	interrupts = <2 8>;
+};
+
 &serial0 {
 	status = "okay";
 };
@@ -85,7 +89,7 @@
 };
 
 &mdio {
-	ethphy: ethphy@0 {
+	ethphy: ethernet-phy@0 {
 		reg = <0>;
 	};
 };