ARM: dts: armada-370-xp: move the cpurst node in the common file

The cpurst nodes are identical in armada-370.dtsi and armada-xp.dtsi
files, so move it in the common armada-370-xp.dtsi file.

Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>

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

@@ -167,7 +167,6 @@
 			};
 
 			cpurst@20800 {
-				compatible = "marvell,armada-370-cpu-reset";
 				reg = <0x20800 0x20>;
 			};