Some issues running rteval on arm64, arm and i386

Hi John,

We ran into a few issues when trying to run rteval on arm64, arm and
i386.

A few of the assumptions in rteval don't hold true on these systems.

    1. On arm64, there is no 'model name' in /proc/cpuinfo. See attached
       sample output from qemu arm64. I verified the same behaviour on
       an arm64 board we have as well.

    2. Also, the build target for the kernel on arm64 is "Image" of
       "bzImage". Rather than use different targets per-architecture it
       maybe better to drop it all together. Do you see any downsides?

The attached patches[1][2] gets things moving with regards to Issues 1
and 2 locally but I am not sure that's the best solution - especially
for "cpuinfo".

    3. Both arm and i386 do not provide "numa" nodes in sysfs. This
       causes rteval to complain "No valid nodes found in
       /sys/devices/system/node"

       Is this requirement planned to be relaxed - it'll be really
       useful to be able to use rteval on these architectures.

Thanks,
Punit