pinctrl: alderlake: Fix register offsets for ADL-N variant

It appears that almost traditionally the N variants have deviations
in the register offsets in comparison to S one. This is the case
for Intel Alder Lake as well. Fix register offsets for ADL-N variant.

Fixes: 114b610b ("pinctrl: alderlake: Add Intel Alder Lake-N pin controller support")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>