pinctrl: lynxpoint: Add pin control data structures

In order to implement pin control for Intel Lynxpoint, we need
data structures in which to store and pass along pin, community
and SoC data information.

Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>