ARM: dts: mstar: Mark timer with arm,cpu-registers-not-fw-configured

The vendor u-boot does not configure the arch timer correctly on
MStar, let Linux do it.

Signed-off-by: Romain Perier <[e-mail]>
Signed-off-by: Daniel Palmer <[e-mail]>
Link: https://lore.kernel.org/linux-arm-kernel/[e-mail]

arch/arm/boot/dts/mstar-v7.dtsi

···
 		 * u-boot is broken
 		 */
 		clock-frequency = <6000000>;
+		arm,cpu-registers-not-fw-configured;
 	};
 
 	pmu: pmu {