dts: arm: nxp_imx943_m33: add scmi cpu protocol node

Added scmi cpu protocol node.

Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>

Author: yangbolu1991

dts/arm/nxp/nxp_imx943_m33.dtsi

@@ -70,6 +70,11 @@
 					compatible = "nxp,imx943-pinctrl", "nxp,imx93-pinctrl";
 				};
 			};
+
+			scmi_cpu: protocol@82 {
+				compatible = "nxp,scmi-cpu";
+				reg = <0x82>;
+			};
 		};
 	};