twl4030_write_script_byte
err = twl4030_write_script_byte(address++, pmb_message >> 8);
err = twl4030_write_script_byte(address++, pmb_message & 0xff);
err = twl4030_write_script_byte(address++, delay);
err = twl4030_write_script_byte(address++, next);