ARM: dts: ls1021a: Specify interrupt-affinity for pmu node

This avoids the warning

  hw perfevents: no interrupt-affinity property for /pmu, guessing.
Signed-off-by: Esben Haabendal <eha@deif.com>
[RV: adapt commit log to the warning emitted in current mainline]
Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/ls1021a.dtsi

@@ -106,6 +106,7 @@ pmu {
 		compatible = "arm,cortex-a7-pmu";
 		interrupts = <GIC_SPI 138 IRQ_TYPE_LEVEL_HIGH>,
 			     <GIC_SPI 139 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-affinity = <&cpu0>, <&cpu1>;
 	};
 
 	reboot {