Hardcode setting for numaNodeCount under NUMA mode

[troore]

Hi @clamchowder,

I found in MemoryBandwidth.c, under NUMA mode, there is a hardcode number (https://github.com/clamchowder/Microbenchmarks/blob/master/MemoryBandwidth/MemoryBandwidth.c#L620):

As the comment indicates, it may be for KNL. So should we recover the numaNodeCount back to numa_max_node() + 1 for other CPUs?

Thanks, troore