pinctrl: intel: Add Intel Lakefield pin controller support

This driver adds pinctrl/GPIO support for Intel Lakefield SoC. The
GPIO controller is based on the next generation GPIO hardware but still
compatible with the one supported by the Intel core pinctrl/GPIO driver.

Cc: Ricardo Neri <ricardo.neri-calderon@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>