ARM: dts: sun8i: Add enable-method for SMP support for the A83T SoC

Add the use of enable-method property for SMP support which allows
to handle the SMP support for this specific SoC.

This commit adds enable-method properties to all CPU nodes.
Signed-off-by: Mylène Josserand <mylene.josserand@bootlin.com>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>

arch/arm/boot/dts/sun8i-a83t.dtsi

@@ -67,6 +67,7 @@ cpu0: cpu@0 {
 			device_type = "cpu";
 			operating-points-v2 = <&cpu0_opp_table>;
 			cci-control-port = <&cci_control0>;
+			enable-method = "allwinner,sun8i-a83t-smp";
 			reg = <0>;
 		};
 
@@ -75,6 +76,7 @@ cpu@1 {
 			device_type = "cpu";
 			operating-points-v2 = <&cpu0_opp_table>;
 			cci-control-port = <&cci_control0>;
+			enable-method = "allwinner,sun8i-a83t-smp";
 			reg = <1>;
 		};
 
@@ -83,6 +85,7 @@ cpu@2 {
 			device_type = "cpu";
 			operating-points-v2 = <&cpu0_opp_table>;
 			cci-control-port = <&cci_control0>;
+			enable-method = "allwinner,sun8i-a83t-smp";
 			reg = <2>;
 		};
 
@@ -91,6 +94,7 @@ cpu@3 {
 			device_type = "cpu";
 			operating-points-v2 = <&cpu0_opp_table>;
 			cci-control-port = <&cci_control0>;
+			enable-method = "allwinner,sun8i-a83t-smp";
 			reg = <3>;
 		};
 
@@ -101,6 +105,7 @@ cpu100: cpu@100 {
 			device_type = "cpu";
 			operating-points-v2 = <&cpu1_opp_table>;
 			cci-control-port = <&cci_control1>;
+			enable-method = "allwinner,sun8i-a83t-smp";
 			reg = <0x100>;
 		};
 
@@ -109,6 +114,7 @@ cpu@101 {
 			device_type = "cpu";
 			operating-points-v2 = <&cpu1_opp_table>;
 			cci-control-port = <&cci_control1>;
+			enable-method = "allwinner,sun8i-a83t-smp";
 			reg = <0x101>;
 		};
 
@@ -117,6 +123,7 @@ cpu@102 {
 			device_type = "cpu";
 			operating-points-v2 = <&cpu1_opp_table>;
 			cci-control-port = <&cci_control1>;
+			enable-method = "allwinner,sun8i-a83t-smp";
 			reg = <0x102>;
 		};
 
@@ -125,6 +132,7 @@ cpu@103 {
 			device_type = "cpu";
 			operating-points-v2 = <&cpu1_opp_table>;
 			cci-control-port = <&cci_control1>;
+			enable-method = "allwinner,sun8i-a83t-smp";
 			reg = <0x103>;
 		};
 	};