chipc_find_region
cr = chipc_find_region(sc, rman_get_start(r), rman_get_end(r));
if ((cr = chipc_find_region(sc, start, end)) == NULL) {
cr = chipc_find_region(sc, rman_get_start(r), rman_get_end(r));
cr = chipc_find_region(sc, rman_get_start(r), rman_get_end(r));
cr = chipc_find_region(sc, r_start, r_end);
struct chipc_region *chipc_find_region(struct chipc_softc *sc,