After commit 028af594 ("mfd: intel-lpss: Pass SDA hold time to
I2C host controller driver") the driver still has a non-used variable.

Remove it here.
Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: NMika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>