[U-Boot] silencing i2c dev?

[Frans Meulenbroeks]

If I run i2c dev to set the bus it replies what it did:

=> i2c dev 0
Setting bus to 0

Other commands do not seem to do that. e.g. mw does not tell it has
written a value.

Should we make i2c dev silent too? (I'm using this in a script and
want to avoid superfluous messages).
If desired I can submit a patch.

Btw there might also be a parsing issue. I once mistyped the cmd but
still it worked:

=> i2c de v0
Setting bus to 0

Haven't had time to dig into this

Frans