STM32MP135: Boot stops if vdd or vdd_ddr defined as fixed-regulator to tf-a device tree

[jhi]

As the title says, when I add the (with or without "regulator-always-on")

vdd: vdd {
		compatible = "regulator-fixed";
		regulator-name = "vdd";
		regulator-min-microvolt = <3300000>;
		regulator-max-microvolt = <3300000>;
	};

or

vdd_ddr: vdd_ddr {
		compatible = "regulator-fixed";
		regulator-name = "vdd_ddr";
		regulator-min-microvolt = <1350000>;
		regulator-max-microvolt = <1350000>;
		regulator-always-on;
	};

 the boot stops 

NOTICE:  CPU: STM32MP135D Rev.Y
NOTICE:  Model: MYIR STM32MP135F Board
ERROR:   nvmem node board_id not found

without any further messages. Why?

JHi