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Nuvoton NPCM7xx SoC EDAC device driver

The Nuvoton NPCM7xx SoC supports DDR4 memory with/without ECC and the driver
uses the EDAC framework to implement the ECC detection and corrtection.

Required properties:
- compatible:	should be "nuvoton,npcm7xx-sdram-edac"
- reg:		Memory controller register set should be <0xf0824000 0x1000>
- interrupts:	should be MC interrupt #25

Example:

	mc: memory-controller@f0824000 {
		compatible = "nuvoton,npcm7xx-sdram-edac";
		reg = <0xf0824000 0x1000>;
		interrupts = <0 25 4>;
	};