sli_callback
sli_callback(&hw->sli, SLI4_CB_LINK, ocs_hw_cb_link, hw);
sli_callback(&hw->sli, SLI4_CB_FIP, ocs_hw_cb_fip, hw);
extern int32_t sli_callback(sli4_t *, sli4_callback_e, void *, void *);