ZL_REG_DPLL_REF_PRIO
rc = zl3073x_read_u8(zldev, ZL_REG_DPLL_REF_PRIO(ref / 2),
rc = zl3073x_read_u8(zldev, ZL_REG_DPLL_REF_PRIO(ref / 2), &ref_prio);
rc = zl3073x_write_u8(zldev, ZL_REG_DPLL_REF_PRIO(ref / 2), ref_prio);