Revert NR_CPUS=1 fix from 4.15 (was: Re: [PATCH] fix for_each_cpu() again for NR_CPUS=1)

[Ian Jackson <iwj@xxxxxxxxxxxxxx>]

Roger Pau Monné writes ("Revert NR_CPUS=1 fix from 4.15 (was: Re: [PATCH] fix 
for_each_cpu() again for NR_CPUS=1)"):
> At this point, should be consider reverting the original fix from the
> 4.15 branch, so that we don't release something that's build broken
> with gcc 10?

Yes.  I think so.

Release-Acked-by: Ian Jackson <iwj@xxxxxxxxxxxxxx>

But please leave it to me to commit it.  I will do so at or after
around 14:00 UK time (13:00 UTC) today unless someone objects.

Thanks,
Ian.