arm64: zynqmp: Add label to pmu fwnode

ZynqMP CG series devices only have two cpus. In this
case the interrupt-affinity property has to adapted, because
cpu3 and cpu4 are missing. By adding a label to the pmu fwnode the
interrupt-affinity can be adapted in a device specific DT.

Signed-off-by: Lukas Funke <lukas.funke@weidmueller.com>
Link: https://lore.kernel.org/r/20240307152956.431104-1-lukas.funke-oss@weidmueller.com
Signed-off-by: Michal Simek <michal.simek@amd.com>
diff --git a/arch/arm/dts/zynqmp.dtsi b/arch/arm/dts/zynqmp.dtsi
index daae23c..e424f26 100644
--- a/arch/arm/dts/zynqmp.dtsi
+++ b/arch/arm/dts/zynqmp.dtsi
@@ -168,7 +168,7 @@
 		bootph-all;
 	};
 
-	pmu {
+	pmu: pmu {
 		compatible = "arm,armv8-pmuv3";
 		interrupt-parent = <&gic>;
 		interrupts = <GIC_SPI 143 IRQ_TYPE_LEVEL_HIGH>,