recipe: Keep i2c as some modules require it

The igb module requires i2c.

Change-Id: I3dd572a790c0fc05e6643ad97094f0304065b936
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1018950
Signed-off-by: Fabian Deutsch <fabiand@fedoraproject.org>