arm64: kernel/sys.c - silence initialization warnings.

[Christoph Hellwig]

On Mon, Mar 15, 2021 at 11:14:34AM +0000, Catalin Marinas wrote:
> We do similar initialisation in arch/arm64/kernel/sys32.c and
> arch/arm64/kernel/traps.c for example. It's a pretty common pattern
> throughout the kernel.
> 
> So we either treat W=1 output as diff against the vanilla kernel when
> checking new patches or we remove override-init altogether from W=1.
> Mark Rutland pointed me to an older thread:

Please just remove the override-init warning, it is not helpful at all.