arm64: dts: renesas: r9a07g043u: Add Cortex-A55 PMU node

Enable the performance monitor unit for the Cortex-A55 core on the
RZ/G2UL (r9a07g043u) SoC.
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20230206001133.28776-1-prabhakar.mahadev-lad.rj@bp.renesas.comSigned-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

arch/arm64/boot/dts/renesas/r9a07g043u.dtsi

@@ -35,6 +35,11 @@ L3_CA55: cache-controller-0 {
 		};
 	};
 
+	pmu {
+		compatible = "arm,cortex-a55-pmu";
+		interrupts-extended = <&gic GIC_PPI 7 IRQ_TYPE_LEVEL_LOW>;
+	};
+
 	psci {
 		compatible = "arm,psci-1.0", "arm,psci-0.2";
 		method = "smc";