LWIS: Should not unlock mutex reg_rw_lock in lwis_interrupt_set_mask

In function lwis_interrupt_set_mask(), it unlocks the mutex
lwis_dev->reg_rw_lock when lwis_device_single_register_read()
failed. But it should not change the lock status that is not it
owned.

Bug: 235927716
Test: GCA, CTS
Signed-off-by: Holmes Chou <holmeschou@google.com>
Change-Id: I4887c6ce7d0d5c70b02e4b49317d677a32088c22
1 file changed