pinctrl: intel: platform: use semicolon instead of comma in ncommunities assignment

Substitute the comma with a semicolon in the `ncommunities` assignment
for better readability and consistency with common C coding style.

Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>