Trivial I2C related fixes/cleanups
 - Remove Unused I2C ID
 - point the I2C device to the physical device
Signed-off-by: NManu Abraham <manu@linuxtv.org>
Acked-by: NOliver Endriss <o.endriss@gmx.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>