ARM: dts: uniphier: switch over to PSCI

Use PSCI for enable-method instead of SoC specific implementation.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/arch/arm/boot/dts/uniphier-ld4.dtsi b/arch/arm/boot/dts/uniphier-ld4.dtsi
index 298fb38..72f8c35 100644
--- a/arch/arm/boot/dts/uniphier-ld4.dtsi
+++ b/arch/arm/boot/dts/uniphier-ld4.dtsi
@@ -56,6 +56,7 @@
 			device_type = "cpu";
 			compatible = "arm,cortex-a9";
 			reg = <0>;
+			enable-method = "psci";
 			next-level-cache = <&l2>;
 		};
 	};