patch: make i2c(8) usable for scripting

[Poul-Henning Kamp]

--------
Mark Murray writes:


> On 15 May 2021, at 21:14, Poul-Henning Kamp <phk at phk.freebsd.dk> wrote:
> > These modes always use the I2CRDWR ioctl, which works on all the
> hardware I have.
>
> Please could you list what you have, for the record?

Rpi4 & BBB

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Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
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