[oe] i2c-dev.h header file

[Philip Balister]

It turns out i2c-dev.h is being staged by two bb files. I assume the 
correct copy comes from the kernel headers file.

The i2c-tools package is also staging a copy that over writes this one. 
This causes a problem with the uhd build.

I'd like to stop the i2c-tools package from staging that header. I think 
this is the proper solution. Installing i2c-tools on my desktop did not 
install this header anywhere and there was no corresponding dev package.

Thoughts? If there are no objections I will implement this in the morning.

Philip