Notes:

1.
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- it's also a tip to include viapm into the kernel, see
    http://people.freebsd.org/~nsouch/iicbus.html
    for details.
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- und schließlich der Tipp, von
    http://people.freebsd.org/~nsouch/iicbus.html
    Support für viapm einzukompilieren
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