seesaw: Clear pull-ups when setting mode to INPUT

.. pull-ups are enabled with INPUT_PULLUP, INPUT_PULLDOWN
and would otherwise never be disabled

Author: jepler

adafruit_seesaw/seesaw.py

@@ -260,6 +260,7 @@ def _pin_mode_bulk_x(self, capacity, offset, pins, mode):
             self.write(_GPIO_BASE, _GPIO_DIRSET_BULK, cmd)
         elif mode == self.INPUT:
             self.write(_GPIO_BASE, _GPIO_DIRCLR_BULK, cmd)
+            self.write(_GPIO_BASE, _GPIO_PULLENCLR, cmd)
 
         elif mode == self.INPUT_PULLUP:
             self.write(_GPIO_BASE, _GPIO_DIRCLR_BULK, cmd)