arm64: dts: rockchip: Correct PMU compatibles for PX30 and RK3308

A proper binding for the Cortex-A35 PMU actually predates these DTs
being upstreamed, so use it.
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/6dfed94a99780c2314b38ff2b55a7efa0be4edbc.1587125314.git.robin.murphy@arm.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/px30.dtsi

@@ -143,7 +143,7 @@ opp-1296000000 {
 	};
 
 	arm-pmu {
-		compatible = "arm,cortex-a53-pmu";
+		compatible = "arm,cortex-a35-pmu";
 		interrupts = <GIC_SPI 100 IRQ_TYPE_LEVEL_HIGH>,
 			     <GIC_SPI 101 IRQ_TYPE_LEVEL_HIGH>,
 			     <GIC_SPI 102 IRQ_TYPE_LEVEL_HIGH>,

arch/arm64/boot/dts/rockchip/rk3308.dtsi

@@ -127,7 +127,7 @@ opp-1008000000 {
 	};
 
 	arm-pmu {
-		compatible = "arm,cortex-a53-pmu";
+		compatible = "arm,cortex-a35-pmu";
 		interrupts = <GIC_SPI 83 IRQ_TYPE_LEVEL_HIGH>,
 			     <GIC_SPI 84 IRQ_TYPE_LEVEL_HIGH>,
 			     <GIC_SPI 85 IRQ_TYPE_LEVEL_HIGH>,