powertop output on SMP

[Alan Jenkins]

 From the FAQ:

    Q. What exactly is the number in parentheses in "39.4% (115.6) foo:
    bar"?
    A. It's the number of wakeups per second and per CPU core.

I think this is potentially a problem.  If you send someone powertop -d 
output e.g. as a bug report, the output doesn't say how many cores you 
have, and for the purposes of fixing software the relevant figure is 
usually the *overall* number of wakeups per second.

I wouldn't like to suggest changing the displayed units, and 
wakeups/core are probably more relevant to the individual.  But I think 
it might be worth adding "cores:" to the summary line, so you can 
multiply the per-core figures in an arbitrary dump.

Alan
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