arm64: dts: imx8mq: Disable sysctr because it breaks cpuidle

For some reason the activating the upsteam sysctr driver causes cpuidle
hangs on imx8mq.

Temporarily disable this until the root cause can be figured out. This
reverts to behavior in linux-nxp before rebase from next-20190809 to
v5.4-rc3.

Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>

arch/arm64/boot/dts/freescale/imx8mq.dtsi

@@ -755,6 +755,7 @@
 				interrupts = <GIC_SPI 47 IRQ_TYPE_LEVEL_HIGH>;
 				clocks = <&osc_25m>;
 				clock-names = "per";
+				status = "disabled";
 			};
 		};