pinctrl: intel: Allow drivers to define ACPI address space ID

Individual drivers may install ACPI OpRegion handlers based on
address space ID which differs from community to community.
Add special field in the struct intel_community for that purpose.

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