pinctrl: intel: Use same order of bit fields for PADCFG2

PADCFG0 and PADCFG1 are ordered from MSB to LSB, do the same
for PADCFG2 bit fields. No functional changes intended.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>