ARM: dts: sun9i: Add enable-method for SMP support for the A80 SoC

Using the enable-method property for SMP support would allow future PSCI
implementations to override any in-OS support. This is better than just
matching against the machine compatible, and then having to determine
whether other methods are available or not.

This adds enable-method properties to all CPU nodes.
Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>
Signed-off-by: Chen-Yu Tsai <wens@csie.org>

arch/arm/boot/dts/sun9i-a80.dtsi

@@ -65,6 +65,7 @@ cpu0: cpu@0 {
 			device_type = "cpu";
 			cci-control-port = <&cci_control0>;
 			clock-frequency = <12000000>;
+			enable-method = "allwinner,sun9i-a80-smp";
 			reg = <0x0>;
 		};
 
@@ -73,6 +74,7 @@ cpu1: cpu@1 {
 			device_type = "cpu";
 			cci-control-port = <&cci_control0>;
 			clock-frequency = <12000000>;
+			enable-method = "allwinner,sun9i-a80-smp";
 			reg = <0x1>;
 		};
 
@@ -81,6 +83,7 @@ cpu2: cpu@2 {
 			device_type = "cpu";
 			cci-control-port = <&cci_control0>;
 			clock-frequency = <12000000>;
+			enable-method = "allwinner,sun9i-a80-smp";
 			reg = <0x2>;
 		};
 
@@ -89,6 +92,7 @@ cpu3: cpu@3 {
 			device_type = "cpu";
 			cci-control-port = <&cci_control0>;
 			clock-frequency = <12000000>;
+			enable-method = "allwinner,sun9i-a80-smp";
 			reg = <0x3>;
 		};
 
@@ -97,6 +101,7 @@ cpu4: cpu@100 {
 			device_type = "cpu";
 			cci-control-port = <&cci_control1>;
 			clock-frequency = <18000000>;
+			enable-method = "allwinner,sun9i-a80-smp";
 			reg = <0x100>;
 		};
 
@@ -105,6 +110,7 @@ cpu5: cpu@101 {
 			device_type = "cpu";
 			cci-control-port = <&cci_control1>;
 			clock-frequency = <18000000>;
+			enable-method = "allwinner,sun9i-a80-smp";
 			reg = <0x101>;
 		};
 
@@ -113,6 +119,7 @@ cpu6: cpu@102 {
 			device_type = "cpu";
 			cci-control-port = <&cci_control1>;
 			clock-frequency = <18000000>;
+			enable-method = "allwinner,sun9i-a80-smp";
 			reg = <0x102>;
 		};
 
@@ -121,6 +128,7 @@ cpu7: cpu@103 {
 			device_type = "cpu";
 			cci-control-port = <&cci_control1>;
 			clock-frequency = <18000000>;
+			enable-method = "allwinner,sun9i-a80-smp";
 			reg = <0x103>;
 		};
 	};