[sw][driver][i2c] make i2c-ocores work with kernels 4.7 and newer

This is an alternative approach to achieve the same goal as !2 (closed) .

Therefore we should only merge one of the two requests.

mentioned in merge request !2 (closed)

mentioned in commit 5b961409a5f4923ed74f872fc0ee706eba23fdb3

closed

Closed because reimplemented in this patch:

https://www.ohwr.org/project/general-cores/commit/ad115623449a3e80d89b725f833b885a9ad29c33