ARM: dts: bcm2711: Don't mark timer regs unconfigured

During upstream process of Raspberry Pi 4 back in 2019 the ARMv7 stubs
didn't configured the ARM architectural timer. This firmware issue has
been fixed in 2020, which gave users enough time to update their system.

So drop this property to allow the use of the vDSO version of
clock_gettime.

Link: raspberrypi/tools#113
Fixes: 7dbe8c6 ("ARM: dts: Add minimal Raspberry Pi 4 support")
Signed-off-by: Phil Elwell <phil@raspberrypi.com>
Signed-off-by: Stefan Wahren <wahrenst@gmx.net>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20250222094113.48198-1-wahrenst@gmx.net
Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>

Author: pelwell

arch/arm/boot/dts/broadcom/bcm2711.dtsi

@@ -451,8 +451,6 @@
 					  IRQ_TYPE_LEVEL_LOW)>,
 			     <GIC_PPI 10 (GIC_CPU_MASK_SIMPLE(4) |
 					  IRQ_TYPE_LEVEL_LOW)>;
-		/* This only applies to the ARMv7 stub */
-		arm,cpu-registers-not-fw-configured;
 	};
 
 	cpus: cpus {