arm64: dts: broadcom: bcm2712: Remove non-functional EL2 virtual timer

arm64: dts: broadcom: bcm2712: Remove non-functional EL2 virtual timer

Commit d87773de9efe1 ("clocksource/drivers/arm_arch_timer: Default to EL2
virtual timer when running VHE") causes boot to hang on Raspberry Pi 5.
The newly-selected EL2 virtual timer does not generate any interrupts,
even though the GIC_DIST_ENABLE_SET flag has been confirmed set via
readback.

It is highly unusual that this timer interrupt is non-operational because
this is a standard GIC interrupt corresponding to a standard Cortex-A76
CPU timer. However, Broadcom have confirmed for this SoC:

> the interrupt line was never connected in the first place as this was
> not identified as being a requirement

Remove the corresponding DeviceTree entry.

Reported-by: Marek Szyprowski <m.szyprowski@samsung.com>
Closes: https://lore.kernel.org/all/ea15cce1-b393-43f6-8d58-3d6f90f0c0cd@samsung.com/
Fixes: faa3381267d0 ("arm64: dts: broadcom: Add minimal support for Raspberry Pi 5")
Signed-off-by: Daniel Drake <dan@reactivated.net>
Link: https://lore.kernel.org/r/20260716-bcm2712-el2-v2-1-e708f7fb42fa@reactivated.net
Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>