ARM: mvebu: add SMP support in the Armada 375 device tree

Improve the Armada 375 Device Tree to add the CPU reset Device Tree
node and declare the enabling method for CPUs, both of which are
necessary to get SMP working.
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Link: https://lkml.kernel.org/r/1397483648-26611-11-git-send-email-thomas.petazzoni@free-electrons.comSigned-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Link: https://lkml.kernel.org/r/1397483648-26611-11-git-send-email-thomas.petazzoni@free-electrons.comSigned-off-by: Jason Cooper <jason@lakedaemon.net>

arch/arm/boot/dts/armada-375.dtsi

@@ -39,6 +39,8 @@ mainpll: mainpll {
 	cpus {
 		#address-cells = <1>;
 		#size-cells = <0>;
+		enable-method = "marvell,armada-375-smp";
+
 		cpu@0 {
 			device_type = "cpu";
 			compatible = "arm,cortex-a9";
@@ -331,6 +333,11 @@ watchdog@20300 {
 				clocks = <&coreclk 0>;
 			};
 
+			cpurst@20800 {
+				compatible = "marvell,armada-370-cpu-reset";
+				reg = <0x20800 0x10>;
+			};
+
 			coherency-fabric@21010 {
 				compatible = "marvell,armada-375-coherency-fabric";
 				reg = <0x21010 0x1c>;