Remove fpi_imgdev_get_action_state?
It's only used in the etes603 driver:
drivers/etes603.c: if (fpi_imgdev_get_action_state(idev) != IMG_ACQUIRE_STATE_DEACTIVATING) {
drivers/etes603.c: if (fpi_imgdev_get_action_state(idev) != IMG_ACQUIRE_STATE_DEACTIVATING) {