add support for i2c restart condition

[cyboflash]

Based on the source code, it doesn't look like there is support for a restart condition.

[jackmitch]

Hi, how is this manipulated from the user space kernel interface. Do you have an example?

[cyboflash]

Don't know. But here is the library that seems like is capable of doing it. User also should enable restart condition on his/her end. I had to do this in my raspberry Pi. Here is how.