intel_pmic_gpio: swap the bits and mask args for intel_scu_ipc_update_register

The intel_scu_ipc_update_register 2nd paramter should the bits and 3rd
paramter should be the mask.

This typo was introduced during IPC function changing...

Reported-by: Ryan Zhou <ryan.zhou@intel.com>
Signed-off-by: Alek Du <alek.du@intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Matthew Garrett <mjg@redhat.com>