stm32_rproc_get_syscon
err = stm32_rproc_get_syscon(np, "st,syscfg-tz", &tz);
err = stm32_rproc_get_syscon(np, "st,syscfg-holdboot",
err = stm32_rproc_get_syscon(np, "st,syscfg-pdds", &ddata->pdds);
err = stm32_rproc_get_syscon(np, "st,syscfg-m4-state",
err = stm32_rproc_get_syscon(np, "st,syscfg-rsc-tbl",